-7x=13-(-8)

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Solution for -7x=13-(-8) equation: 


Simplifying
-7x = 13 + -1(-8)

Multiply -1 * -8
-7x = 13 + 8

Combine like terms: 13 + 8 = 21
-7x = 21

Solving
-7x = 21

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Divide each side by '-7'.
x = -3

Simplifying
x = -3

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