120=x+(x+10)+(x+65)

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Solution for 120=x+(x+10)+(x+65) equation:


Simplifying
120 = x + (x + 10) + (x + 65)

Reorder the terms:
120 = x + (10 + x) + (x + 65)

Remove parenthesis around (10 + x)
120 = x + 10 + x + (x + 65)

Reorder the terms:
120 = x + 10 + x + (65 + x)

Remove parenthesis around (65 + x)
120 = x + 10 + x + 65 + x

Reorder the terms:
120 = 10 + 65 + x + x + x

Combine like terms: 10 + 65 = 75
120 = 75 + x + x + x

Combine like terms: x + x = 2x
120 = 75 + 2x + x

Combine like terms: 2x + x = 3x
120 = 75 + 3x

Solving
120 = 75 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
120 + -3x = 75 + 3x + -3x

Combine like terms: 3x + -3x = 0
120 + -3x = 75 + 0
120 + -3x = 75

Add '-120' to each side of the equation.
120 + -120 + -3x = 75 + -120

Combine like terms: 120 + -120 = 0
0 + -3x = 75 + -120
-3x = 75 + -120

Combine like terms: 75 + -120 = -45
-3x = -45

Divide each side by '-3'.
x = 15

Simplifying
x = 15

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