12+3x=-15

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Solution for 12+3x=-15 equation: 


Simplifying
12 + 3x = -15

Solving
12 + 3x = -15

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + 3x = -15 + -12

Combine like terms: 12 + -12 = 0
0 + 3x = -15 + -12
3x = -15 + -12

Combine like terms: -15 + -12 = -27
3x = -27

Divide each side by '3'.
x = -9

Simplifying
x = -9

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