-30-9x=8x+21

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Solution for -30-9x=8x+21 equation:


Simplifying
-30 + -9x = 8x + 21

Reorder the terms:
-30 + -9x = 21 + 8x

Solving
-30 + -9x = 21 + 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
-30 + -9x + -8x = 21 + 8x + -8x

Combine like terms: -9x + -8x = -17x
-30 + -17x = 21 + 8x + -8x

Combine like terms: 8x + -8x = 0
-30 + -17x = 21 + 0
-30 + -17x = 21

Add '30' to each side of the equation.
-30 + 30 + -17x = 21 + 30

Combine like terms: -30 + 30 = 0
0 + -17x = 21 + 30
-17x = 21 + 30

Combine like terms: 21 + 30 = 51
-17x = 51

Divide each side by '-17'.
x = -3

Simplifying
x = -3

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