20=x+8+x-3-x

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Solution for 20=x+8+x-3-x equation:


Simplifying
20 = x + 8 + x + -3 + -1x

Reorder the terms:
20 = 8 + -3 + x + x + -1x

Combine like terms: 8 + -3 = 5
20 = 5 + x + x + -1x

Combine like terms: x + x = 2x
20 = 5 + 2x + -1x

Combine like terms: 2x + -1x = 1x
20 = 5 + 1x

Solving
20 = 5 + 1x

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.
20 + -1x = 5 + 1x + -1x

Combine like terms: 1x + -1x = 0
20 + -1x = 5 + 0
20 + -1x = 5

Add '-20' to each side of the equation.
20 + -20 + -1x = 5 + -20

Combine like terms: 20 + -20 = 0
0 + -1x = 5 + -20
-1x = 5 + -20

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

Divide each side by '-1'.
x = 15

Simplifying
x = 15

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