-51-9x=9x+21

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Solution for -51-9x=9x+21 equation:


Simplifying
-51 + -9x = 9x + 21

Reorder the terms:
-51 + -9x = 21 + 9x

Solving
-51 + -9x = 21 + 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.
-51 + -9x + -9x = 21 + 9x + -9x

Combine like terms: -9x + -9x = -18x
-51 + -18x = 21 + 9x + -9x

Combine like terms: 9x + -9x = 0
-51 + -18x = 21 + 0
-51 + -18x = 21

Add '51' to each side of the equation.
-51 + 51 + -18x = 21 + 51

Combine like terms: -51 + 51 = 0
0 + -18x = 21 + 51
-18x = 21 + 51

Combine like terms: 21 + 51 = 72
-18x = 72

Divide each side by '-18'.
x = -4

Simplifying
x = -4

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