-21=-2x

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Solution for -21=-2x equation:


Simplifying
-21 = -2x

Solving
-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.
-21 + 2x = -2x + 2x

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

Add '21' to each side of the equation.
-21 + 21 + 2x = 0 + 21

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

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

Divide each side by '2'.
x = 10.5

Simplifying
x = 10.5

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