3x-1+129+15x-17=90

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Solution for 3x-1+129+15x-17=90 equation:


Simplifying
3x + -1 + 129 + 15x + -17 = 90

Reorder the terms:
-1 + 129 + -17 + 3x + 15x = 90

Combine like terms: -1 + 129 = 128
128 + -17 + 3x + 15x = 90

Combine like terms: 128 + -17 = 111
111 + 3x + 15x = 90

Combine like terms: 3x + 15x = 18x
111 + 18x = 90

Solving
111 + 18x = 90

Solving for variable 'x'.

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

Add '-111' to each side of the equation.
111 + -111 + 18x = 90 + -111

Combine like terms: 111 + -111 = 0
0 + 18x = 90 + -111
18x = 90 + -111

Combine like terms: 90 + -111 = -21
18x = -21

Divide each side by '18'.
x = -1.166666667

Simplifying
x = -1.166666667

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