9=-12-3x-4x

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Solution for 9=-12-3x-4x equation:


Simplifying
9 = -12 + -3x + -4x

Combine like terms: -3x + -4x = -7x
9 = -12 + -7x

Solving
9 = -12 + -7x

Solving for variable 'x'.

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

Add '7x' to each side of the equation.
9 + 7x = -12 + -7x + 7x

Combine like terms: -7x + 7x = 0
9 + 7x = -12 + 0
9 + 7x = -12

Add '-9' to each side of the equation.
9 + -9 + 7x = -12 + -9

Combine like terms: 9 + -9 = 0
0 + 7x = -12 + -9
7x = -12 + -9

Combine like terms: -12 + -9 = -21
7x = -21

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

Simplifying
x = -3

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