129-7x=9x+15

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Solution for 129-7x=9x+15 equation:


Simplifying
129 + -7x = 9x + 15

Reorder the terms:
129 + -7x = 15 + 9x

Solving
129 + -7x = 15 + 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.
129 + -7x + -9x = 15 + 9x + -9x

Combine like terms: -7x + -9x = -16x
129 + -16x = 15 + 9x + -9x

Combine like terms: 9x + -9x = 0
129 + -16x = 15 + 0
129 + -16x = 15

Add '-129' to each side of the equation.
129 + -129 + -16x = 15 + -129

Combine like terms: 129 + -129 = 0
0 + -16x = 15 + -129
-16x = 15 + -129

Combine like terms: 15 + -129 = -114
-16x = -114

Divide each side by '-16'.
x = 7.125

Simplifying
x = 7.125

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