-7x=12-(-9)

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Solution for -7x=12-(-9) equation: 


Simplifying
-7x = 12 + -1(-9)

Multiply -1 * -9
-7x = 12 + 9

Combine like terms: 12 + 9 = 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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