220=21-12x

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Solution for 220=21-12x equation:


Simplifying
220 = 21 + -12x

Solving
220 = 21 + -12x

Solving for variable 'x'.

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

Add '12x' to each side of the equation.
220 + 12x = 21 + -12x + 12x

Combine like terms: -12x + 12x = 0
220 + 12x = 21 + 0
220 + 12x = 21

Add '-220' to each side of the equation.
220 + -220 + 12x = 21 + -220

Combine like terms: 220 + -220 = 0
0 + 12x = 21 + -220
12x = 21 + -220

Combine like terms: 21 + -220 = -199
12x = -199

Divide each side by '12'.
x = -16.58333333

Simplifying
x = -16.58333333

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