20-x-5=8

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Solution for 20-x-5=8 equation:


Simplifying
20 + -1x + -5 = 8

Reorder the terms:
20 + -5 + -1x = 8

Combine like terms: 20 + -5 = 15
15 + -1x = 8

Solving
15 + -1x = 8

Solving for variable 'x'.

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

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

Combine like terms: 15 + -15 = 0
0 + -1x = 8 + -15
-1x = 8 + -15

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

Divide each side by '-1'.
x = 7

Simplifying
x = 7

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