13-(-9x)+3x-(-12)=

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Solution for 13-(-9x)+3x-(-12)= equation: 


Simplifying
13 + -1(-9x) + 3x + -1(-12) = 0

Remove parenthesis around (-9x)
13 + -1 * -9x + 3x + -1(-12) = 0

Multiply -1 * -9
13 + 9x + 3x + -1(-12) = 0

Multiply -1 * -12
13 + 9x + 3x + 12 = 0

Reorder the terms:
13 + 12 + 9x + 3x = 0

Combine like terms: 13 + 12 = 25
25 + 9x + 3x = 0

Combine like terms: 9x + 3x = 12x
25 + 12x = 0

Solving
25 + 12x = 0

Solving for variable 'x'.

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

Add '-25' to each side of the equation.
25 + -25 + 12x = 0 + -25

Combine like terms: 25 + -25 = 0
0 + 12x = 0 + -25
12x = 0 + -25

Combine like terms: 0 + -25 = -25
12x = -25

Divide each side by '12'.
x = -2.083333333

Simplifying
x = -2.083333333

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