x-(2x-1)=21

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


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

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

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

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

Solving
1 + -1x = 21

Solving for variable 'x'.

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

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

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

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

Divide each side by '-1'.
x = -20

Simplifying
x = -20

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