1x-(21-1x)=3

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Solution for 1x-(21-1x)=3 equation:


Simplifying
1x + -1(21 + -1x) = 3
1x + (21 * -1 + -1x * -1) = 3
1x + (-21 + 1x) = 3

Reorder the terms:
-21 + 1x + 1x = 3

Combine like terms: 1x + 1x = 2x
-21 + 2x = 3

Solving
-21 + 2x = 3

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + 2x = 3 + 21

Combine like terms: -21 + 21 = 0
0 + 2x = 3 + 21
2x = 3 + 21

Combine like terms: 3 + 21 = 24
2x = 24

Divide each side by '2'.
x = 12

Simplifying
x = 12

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