-21=x+-15

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Solution for -21=x+-15 equation:


Simplifying
-21 = x + -15

Reorder the terms:
-21 = -15 + x

Solving
-21 = -15 + 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.
-21 + -1x = -15 + x + -1x

Combine like terms: x + -1x = 0
-21 + -1x = -15 + 0
-21 + -1x = -15

Add '21' to each side of the equation.
-21 + 21 + -1x = -15 + 21

Combine like terms: -21 + 21 = 0
0 + -1x = -15 + 21
-1x = -15 + 21

Combine like terms: -15 + 21 = 6
-1x = 6

Divide each side by '-1'.
x = -6

Simplifying
x = -6

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