-13=1+x-3x

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Solution for -13=1+x-3x equation:


Simplifying
-13 = 1 + x + -3x

Combine like terms: x + -3x = -2x
-13 = 1 + -2x

Solving
-13 = 1 + -2x

Solving for variable 'x'.

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

Add '2x' to each side of the equation.
-13 + 2x = 1 + -2x + 2x

Combine like terms: -2x + 2x = 0
-13 + 2x = 1 + 0
-13 + 2x = 1

Add '13' to each side of the equation.
-13 + 13 + 2x = 1 + 13

Combine like terms: -13 + 13 = 0
0 + 2x = 1 + 13
2x = 1 + 13

Combine like terms: 1 + 13 = 14
2x = 14

Divide each side by '2'.
x = 7

Simplifying
x = 7

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