129-9x=7x+15

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


Simplifying
129 + -9x = 7x + 15

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

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

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

Combine like terms: 7x + -7x = 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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