8x-20=7-x

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


Simplifying
8x + -20 = 7 + -1x

Reorder the terms:
-20 + 8x = 7 + -1x

Solving
-20 + 8x = 7 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
-20 + 8x + x = 7 + -1x + x

Combine like terms: 8x + x = 9x
-20 + 9x = 7 + -1x + x

Combine like terms: -1x + x = 0
-20 + 9x = 7 + 0
-20 + 9x = 7

Add '20' to each side of the equation.
-20 + 20 + 9x = 7 + 20

Combine like terms: -20 + 20 = 0
0 + 9x = 7 + 20
9x = 7 + 20

Combine like terms: 7 + 20 = 27
9x = 27

Divide each side by '9'.
x = 3

Simplifying
x = 3

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