-21-9x=9x+15

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Solution for -21-9x=9x+15 equation:


Simplifying
-21 + -9x = 9x + 15

Reorder the terms:
-21 + -9x = 15 + 9x

Solving
-21 + -9x = 15 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
-21 + -9x + -9x = 15 + 9x + -9x

Combine like terms: -9x + -9x = -18x
-21 + -18x = 15 + 9x + -9x

Combine like terms: 9x + -9x = 0
-21 + -18x = 15 + 0
-21 + -18x = 15

Add '21' to each side of the equation.
-21 + 21 + -18x = 15 + 21

Combine like terms: -21 + 21 = 0
0 + -18x = 15 + 21
-18x = 15 + 21

Combine like terms: 15 + 21 = 36
-18x = 36

Divide each side by '-18'.
x = -2

Simplifying
x = -2

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