1-(-x)=13

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Solution for 1-(-x)=13 equation: 


Simplifying
1 + -1(-1x) = 13

Remove parenthesis around (-1x)
1 + -1 * -1x = 13

Multiply -1 * -1
1 + 1x = 13

Solving
1 + 1x = 13

Solving for variable 'x'.

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

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

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

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

Divide each side by '1'.
x = 12

Simplifying
x = 12

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