-123-9x=7x+21

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


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

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

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

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
-123 + -9x + -7x = 21 + 7x + -7x

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

Combine like terms: 7x + -7x = 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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