-123-7x=9x+21

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Solution for -123-7x=9x+21 equation:


Simplifying
-123 + -7x = 9x + 21

Reorder the terms:
-123 + -7x = 21 + 9x

Solving
-123 + -7x = 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.
-123 + -7x + -9x = 21 + 9x + -9x

Combine like terms: -7x + -9x = -16x
-123 + -16x = 21 + 9x + -9x

Combine like terms: 9x + -9x = 0
-123 + -16x = 21 + 0
-123 + -16x = 21

Add '123' to each side of the equation.
-123 + 123 + -16x = 21 + 123

Combine like terms: -123 + 123 = 0
0 + -16x = 21 + 123
-16x = 21 + 123

Combine like terms: 21 + 123 = 144
-16x = 144

Divide each side by '-16'.
x = -9

Simplifying
x = -9

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