120=12x+13x+15x

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Solution for 120=12x+13x+15x equation:


Simplifying
120 = 12x + 13x + 15x

Combine like terms: 12x + 13x = 25x
120 = 25x + 15x

Combine like terms: 25x + 15x = 40x
120 = 40x

Solving
120 = 40x

Solving for variable 'x'.

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

Add '-40x' to each side of the equation.
120 + -40x = 40x + -40x

Combine like terms: 40x + -40x = 0
120 + -40x = 0

Add '-120' to each side of the equation.
120 + -120 + -40x = 0 + -120

Combine like terms: 120 + -120 = 0
0 + -40x = 0 + -120
-40x = 0 + -120

Combine like terms: 0 + -120 = -120
-40x = -120

Divide each side by '-40'.
x = 3

Simplifying
x = 3

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