7x+5x-20=80-8x

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Solution for 7x+5x-20=80-8x equation: 


Simplifying
7x + 5x + -20 = 80 + -8x

Reorder the terms:
-20 + 7x + 5x = 80 + -8x

Combine like terms: 7x + 5x = 12x
-20 + 12x = 80 + -8x

Solving
-20 + 12x = 80 + -8x

Solving for variable 'x'.

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

Add '8x' to each side of the equation.
-20 + 12x + 8x = 80 + -8x + 8x

Combine like terms: 12x + 8x = 20x
-20 + 20x = 80 + -8x + 8x

Combine like terms: -8x + 8x = 0
-20 + 20x = 80 + 0
-20 + 20x = 80

Add '20' to each side of the equation.
-20 + 20 + 20x = 80 + 20

Combine like terms: -20 + 20 = 0
0 + 20x = 80 + 20
20x = 80 + 20

Combine like terms: 80 + 20 = 100
20x = 100

Divide each side by '20'.
x = 5

Simplifying
x = 5

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