13-x=-7

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Solution for 13-x=-7 equation: 


Simplifying
13 + -1x = -7

Solving
13 + -1x = -7

Solving for variable 'x'.

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

Add '-13' to each side of the equation.
13 + -13 + -1x = -7 + -13

Combine like terms: 13 + -13 = 0
0 + -1x = -7 + -13
-1x = -7 + -13

Combine like terms: -7 + -13 = -20
-1x = -20

Divide each side by '-1'.
x = 20

Simplifying
x = 20

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