13=1-7x-5x

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Solution for 13=1-7x-5x equation:


Simplifying
13 = 1 + -7x + -5x

Combine like terms: -7x + -5x = -12x
13 = 1 + -12x

Solving
13 = 1 + -12x

Solving for variable 'x'.

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

Add '12x' to each side of the equation.
13 + 12x = 1 + -12x + 12x

Combine like terms: -12x + 12x = 0
13 + 12x = 1 + 0
13 + 12x = 1

Add '-13' to each side of the equation.
13 + -13 + 12x = 1 + -13

Combine like terms: 13 + -13 = 0
0 + 12x = 1 + -13
12x = 1 + -13

Combine like terms: 1 + -13 = -12
12x = -12

Divide each side by '12'.
x = -1

Simplifying
x = -1

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