7x+8x+100=20x-100

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Solution for 7x+8x+100=20x-100 equation:


Simplifying
7x + 8x + 100 = 20x + -100

Reorder the terms:
100 + 7x + 8x = 20x + -100

Combine like terms: 7x + 8x = 15x
100 + 15x = 20x + -100

Reorder the terms:
100 + 15x = -100 + 20x

Solving
100 + 15x = -100 + 20x

Solving for variable 'x'.

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

Add '-20x' to each side of the equation.
100 + 15x + -20x = -100 + 20x + -20x

Combine like terms: 15x + -20x = -5x
100 + -5x = -100 + 20x + -20x

Combine like terms: 20x + -20x = 0
100 + -5x = -100 + 0
100 + -5x = -100

Add '-100' to each side of the equation.
100 + -100 + -5x = -100 + -100

Combine like terms: 100 + -100 = 0
0 + -5x = -100 + -100
-5x = -100 + -100

Combine like terms: -100 + -100 = -200
-5x = -200

Divide each side by '-5'.
x = 40

Simplifying
x = 40

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