College

6. Given: -5(x + 4) = 70; Prove: x= -18

Statements

1.-5(x + 4) = 70

2.-5x20= 70

3. —5x = 90

4. x = -18

1.

2.

3.

4.

Reasons

Answer :

The value of x in the equation is -18.

How to find variables in an equation?

-5(x + 4) = 70

open the bracket

-5x - 20 = 70

add 20 to both sides of the equation

-5x - 20 = 70

-5x - 20 + 20 = 70 + 20

-5x = 90

divide both sides by -5

Hence,

-5x / -5 = 90 / -5

x = -18

Therefore, the value of x in the equation is -18.

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