-7=2x-21

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Solution for -7=2x-21 equation:


Simplifying
-7 = 2x + -21

Reorder the terms:
-7 = -21 + 2x

Solving
-7 = -21 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
-7 + -2x = -21 + 2x + -2x

Combine like terms: 2x + -2x = 0
-7 + -2x = -21 + 0
-7 + -2x = -21

Add '7' to each side of the equation.
-7 + 7 + -2x = -21 + 7

Combine like terms: -7 + 7 = 0
0 + -2x = -21 + 7
-2x = -21 + 7

Combine like terms: -21 + 7 = -14
-2x = -14

Divide each side by '-2'.
x = 7

Simplifying
x = 7

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