8x-15=x+20

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Solution for 8x-15=x+20 equation:


Simplifying
8x + -15 = x + 20

Reorder the terms:
-15 + 8x = x + 20

Reorder the terms:
-15 + 8x = 20 + x

Solving
-15 + 8x = 20 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-15 + 8x + -1x = 20 + x + -1x

Combine like terms: 8x + -1x = 7x
-15 + 7x = 20 + x + -1x

Combine like terms: x + -1x = 0
-15 + 7x = 20 + 0
-15 + 7x = 20

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

Combine like terms: -15 + 15 = 0
0 + 7x = 20 + 15
7x = 20 + 15

Combine like terms: 20 + 15 = 35
7x = 35

Divide each side by '7'.
x = 5

Simplifying
x = 5

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