-7+12-21=x

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Solution for -7+12-21=x equation:


Simplifying
-7 + 12 + -21 = x

Combine like terms: -7 + 12 = 5
5 + -21 = x

Combine like terms: 5 + -21 = -16
-16 = x

Solving
-16 = 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.
-16 + -1x = x + -1x

Combine like terms: x + -1x = 0
-16 + -1x = 0

Add '16' to each side of the equation.
-16 + 16 + -1x = 0 + 16

Combine like terms: -16 + 16 = 0
0 + -1x = 0 + 16
-1x = 0 + 16

Combine like terms: 0 + 16 = 16
-1x = 16

Divide each side by '-1'.
x = -16

Simplifying
x = -16

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