15x+20=7x+100

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Solution for 15x+20=7x+100 equation: 


Simplifying
15x + 20 = 7x + 100

Reorder the terms:
20 + 15x = 7x + 100

Reorder the terms:
20 + 15x = 100 + 7x

Solving
20 + 15x = 100 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
20 + 15x + -7x = 100 + 7x + -7x

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

Combine like terms: 7x + -7x = 0
20 + 8x = 100 + 0
20 + 8x = 100

Add '-20' to each side of the equation.
20 + -20 + 8x = 100 + -20

Combine like terms: 20 + -20 = 0
0 + 8x = 100 + -20
8x = 100 + -20

Combine like terms: 100 + -20 = 80
8x = 80

Divide each side by '8'.
x = 10

Simplifying
x = 10

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