Step-1

Title: Solve the equation

Grade: 8-a Lesson: S3-L1

Explanation: Hello Students, time to practice and review the steps for the problem.

Lesson Steps

Step Type Explanation Answer

1

Problem

Solve the equation
\$ |- x + 2| = - 7 \$

2

Formula:

By using formula

\$| x | = a \$

3

Hint

By removing mod we get (+) (or) (-)

\$x = a (or) x = - a\$

4

Step

Here 'a' is '-7'

\$-x + 2 = - 7(or) -x + 2 = - (- 7)\$

5

Step

After multiplication

\$-x + 2 = - 7(or)- x + 2 = 7 \$

6

Step

Adding "- 2" on both sides

\$- x + \cancel2 - \cancel2 = -7 - 2 (or) -x + \cancel2 - \cancel2 = 7 - 2 \$

7

Step

After cancellation

\$-x = - 9 (or)- x = 5 \$

8

Step

Multiplying Negative sign on both sides

\$-(-x) = - (-9) (or) -(-x) = - 5\$

9

Step

After multiplication

\$ x = 9 (or) x = - 5 \$

10

Answer

A


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