Chapter 15 · Class 7 CBSE · Formula Sheet

Simple Equations Formulas — Class 7 CBSE

Set up and solve simple linear equations in one variable.

Key Formulas

Linear Equation

ax + b = c

Solving

ax + b = c \implies x = \dfrac{c - b}{a}

Transposing Rule

\text{Change side, change sign}

Worked Examples

1Using: Linear Equation

Solve 3x + 5 = 20.

Step 1: 3x = 20 - 5 = 15.

Step 2: x = 15 / 3 = 5.

Answer: x = 5

2Using: Algebraic Identity

Expand (a + 3)^2.

Step 1: Using (a + b)^2 = a^2 + 2ab + b^2

Step 2: = a^2 + 6a + 9.

Answer: a^2 + 6a + 9

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More Class 7 CBSE Formulas

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Frequently Asked Questions

How many formulas are in Class 7 CBSE Simple Equations?+
There are 3 formulas in the Simple Equations chapter for Class 7 CBSE. Each formula is essential for solving problems in this topic.
How to remember Simple Equations formulas easily?+
Practice regularly with worked examples, group related formulas together, and use SparkEd's interactive practice mode to reinforce your memory through problem-solving.
Are these Simple Equations formulas enough for exams?+
Yes, these formulas cover the complete CBSE Class 7 syllabus for Simple Equations. Practice applying them to different types of questions for full exam readiness.

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