5+7=-3x-9

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Solution for 5+7=-3x-9 equation:


Simplifying
5 + 7 = -3x + -9

Combine like terms: 5 + 7 = 12
12 = -3x + -9

Reorder the terms:
12 = -9 + -3x

Solving
12 = -9 + -3x

Solving for variable 'x'.

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

Add '3x' to each side of the equation.
12 + 3x = -9 + -3x + 3x

Combine like terms: -3x + 3x = 0
12 + 3x = -9 + 0
12 + 3x = -9

Add '-12' to each side of the equation.
12 + -12 + 3x = -9 + -12

Combine like terms: 12 + -12 = 0
0 + 3x = -9 + -12
3x = -9 + -12

Combine like terms: -9 + -12 = -21
3x = -21

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

Simplifying
x = -7

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