x+8x+x+20=120

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Solution for x+8x+x+20=120 equation: 


Simplifying
x + 8x + x + 20 = 120

Reorder the terms:
20 + x + 8x + x = 120

Combine like terms: x + 8x = 9x
20 + 9x + x = 120

Combine like terms: 9x + x = 10x
20 + 10x = 120

Solving
20 + 10x = 120

Solving for variable 'x'.

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

Add '-20' to each side of the equation.
20 + -20 + 10x = 120 + -20

Combine like terms: 20 + -20 = 0
0 + 10x = 120 + -20
10x = 120 + -20

Combine like terms: 120 + -20 = 100
10x = 100

Divide each side by '10'.
x = 10

Simplifying
x = 10

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