-x-3=13+x

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


Simplifying
-1x + -3 = 13 + x

Reorder the terms:
-3 + -1x = 13 + x

Solving
-3 + -1x = 13 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-3 + -1x + -1x = 13 + x + -1x

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

Combine like terms: x + -1x = 0
-3 + -2x = 13 + 0
-3 + -2x = 13

Add '3' to each side of the equation.
-3 + 3 + -2x = 13 + 3

Combine like terms: -3 + 3 = 0
0 + -2x = 13 + 3
-2x = 13 + 3

Combine like terms: 13 + 3 = 16
-2x = 16

Divide each side by '-2'.
x = -8

Simplifying
x = -8

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