20-2x=x-1

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Solution for 20-2x=x-1 equation:


Simplifying
20 + -2x = x + -1

Reorder the terms:
20 + -2x = -1 + x

Solving
20 + -2x = -1 + 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.
20 + -2x + -1x = -1 + x + -1x

Combine like terms: -2x + -1x = -3x
20 + -3x = -1 + x + -1x

Combine like terms: x + -1x = 0
20 + -3x = -1 + 0
20 + -3x = -1

Add '-20' to each side of the equation.
20 + -20 + -3x = -1 + -20

Combine like terms: 20 + -20 = 0
0 + -3x = -1 + -20
-3x = -1 + -20

Combine like terms: -1 + -20 = -21
-3x = -21

Divide each side by '-3'.
x = 7

Simplifying
x = 7

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