15-(-3)=x

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Solution for 15-(-3)=x equation:


Simplifying
15 + -1(-3) = x

Multiply -1 * -3
15 + 3 = x

Combine like terms: 15 + 3 = 18
18 = x

Solving
18 = 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.
18 + -1x = x + -1x

Combine like terms: x + -1x = 0
18 + -1x = 0

Add '-18' to each side of the equation.
18 + -18 + -1x = 0 + -18

Combine like terms: 18 + -18 = 0
0 + -1x = 0 + -18
-1x = 0 + -18

Combine like terms: 0 + -18 = -18
-1x = -18

Divide each side by '-1'.
x = 18

Simplifying
x = 18

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