x-2(x-1)=21

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Solution for x-2(x-1)=21 equation:


Simplifying
x + -2(x + -1) = 21

Reorder the terms:
x + -2(-1 + x) = 21
x + (-1 * -2 + x * -2) = 21
x + (2 + -2x) = 21

Reorder the terms:
2 + x + -2x = 21

Combine like terms: x + -2x = -1x
2 + -1x = 21

Solving
2 + -1x = 21

Solving for variable 'x'.

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

Add '-2' to each side of the equation.
2 + -2 + -1x = 21 + -2

Combine like terms: 2 + -2 = 0
0 + -1x = 21 + -2
-1x = 21 + -2

Combine like terms: 21 + -2 = 19
-1x = 19

Divide each side by '-1'.
x = -19

Simplifying
x = -19

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