([1]~[3] are the contents of Volume 1.)

[4].
Equation for price

1.
Terminology
2.
a% profit
3.
a% discount
4.
Selling price and selling profit
Unit conclusion
Take a break

[5].
Equation for ratio

1.
Part and remainder
2.
Problems with Increase and Decrease (1)
3.
Problems with Increase and Decrease (2)
4.
Problems with Rain (1)
5.
Problems with Rain (2)
Unit conclusion
Take a break

[6].
Equation for concentration

1.
The concentration is thick
2.
Express concentration as a %
3.
Find the amount of salt water
4.
Find the amount of salt
5.
When the amount of water changes
6.
When the amount of salt changes
7.
Combine salt water
Unit conclusion
Take a break

Answers and Explanations

1.
Practice drawing diagrams and images.

The problems covered in 『The Concept of Linear Equations Comes First 2』 are complex application types, including problems of price of goods, increase and decrease, and concentration.
So, it is important to practice writing equations step by step according to the situation of the problem.
For this section, we have provided pictures so that you can practice problem situations with pictures, and ultimately, even if you look at a problem without pictures, we have designed it so that you can understand the problem and write the equation as you practiced.
For questions about the price of an item, we have provided boxes for each stage to practice writing equations in a flow that starts from the list price and ends at the selling price. For questions about increase and decrease, we have organized the equations in a table, and for questions about concentration, we have drawn pictures to write the equations.
You can challenge yourself step by step, from simple to complex problems.


2.
Present the basis of logic!

Because mathematics is structured logically, if there is a hole at any stage, it is difficult to build new knowledge thereafter.
However, learners often neglect to study the parts that do not appear on the test.
It may be okay now, but over time, this will create gaps in your logical thinking, which will hinder your ability to learn math properly.
In 『The Concept of Linear Equations Comes First 2』, rather than simply solving problems with formulas, it explains the fundamental principles of why equations are created that way.
It is structured so that you can learn various methods to solve problems in various situations, presenting sound logical grounds even for the smallest details.

3.
The important thing is big! In image!

You might think a book that explains abstract mathematical concepts in a mathematical way would be difficult? Not so! This book explains abstract concepts in a way that's easy for learners to remember.
The content is developed with interesting materials and pictures, and the intensity of the content is effectively expressed so that important information can be seen at a glance.
Discover "Linear Equations: Concepts Come First 2," featuring an intuitive design that lets you grasp concepts at a glance, plentiful explanations, and comprehensive problems.

4.
Friendly answer sheet!

All calculation processes are detailed, just as if the teacher had explained them, and various clues hidden in the problem are highlighted with colors and arrows, so that you can intuitively know how to use them at which stage.
Upgrade your friends' calculation skills with this friendly answer sheet.

5.
Free video lectures!

This book provides video lectures on every page from beginning to end.
Because it includes complete concept explanations and problem-solving, you can study the entire book along with the lectures, or you can use the lectures to only cover the parts you need.
You can view the lecture immediately by scanning the QR code without separate registration, and you can check out more reference materials at www.mathbus.co.kr.
Have fun studying with a former EBS teacher's cheerful, refreshing, and exhilarating lectures!

Great for students like this!

*Students who are good at finding answers, but don't know the concept when asked about it
*Students who seem to know, but don't know how to solve slightly difficult problems.

A math book worthy of being called math!!

Mathematics is often said to be beautiful because it presents the content in a clean and uncluttered way.
Discover the most mathematically solvable linear equations right now.

A book that proves that math books can be pretty too!!!

A math book with a pastel-toned layout that resembles a fairy tale has been published, unfolding mathematical concepts through illustrations.
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