Respuesta :

Ammimochi

Simplify brackets

x + -7 = 2

Simplify x + -7 to x - 7

x - 7 = 2

Add 7 to both sides

x = 2 + 7

Simplify 2 + 7 to 9

x = 9

garydesir1

Hello there!


x + (-7) = 2

The rules says: When we have + multiply by -, the answer is -

                          When we have a positive sign multiply by a negative sign, the answer is negative.

Thus,

x - 7 = 2

Add 7 on both sides

x - 7 + 7 = 2 + 7

x = 9

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