-69-9=9x+21

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Solution for -69-9=9x+21 equation:


Simplifying
-69 + -9 = 9x + 21

Combine like terms: -69 + -9 = -78
-78 = 9x + 21

Reorder the terms:
-78 = 21 + 9x

Solving
-78 = 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.
-78 + -9x = 21 + 9x + -9x

Combine like terms: 9x + -9x = 0
-78 + -9x = 21 + 0
-78 + -9x = 21

Add '78' to each side of the equation.
-78 + 78 + -9x = 21 + 78

Combine like terms: -78 + 78 = 0
0 + -9x = 21 + 78
-9x = 21 + 78

Combine like terms: 21 + 78 = 99
-9x = 99

Divide each side by '-9'.
x = -11

Simplifying
x = -11

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