21+2x=-9+12x

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Solution for 21+2x=-9+12x equation:


Simplifying
21 + 2x = -9 + 12x

Solving
21 + 2x = -9 + 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.
21 + 2x + -12x = -9 + 12x + -12x

Combine like terms: 2x + -12x = -10x
21 + -10x = -9 + 12x + -12x

Combine like terms: 12x + -12x = 0
21 + -10x = -9 + 0
21 + -10x = -9

Add '-21' to each side of the equation.
21 + -21 + -10x = -9 + -21

Combine like terms: 21 + -21 = 0
0 + -10x = -9 + -21
-10x = -9 + -21

Combine like terms: -9 + -21 = -30
-10x = -30

Divide each side by '-10'.
x = 3

Simplifying
x = 3

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