18-(x-2)=21

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Solution for 18-(x-2)=21 equation:


Simplifying
18 + -1(x + -2) = 21

Reorder the terms:
18 + -1(-2 + x) = 21
18 + (-2 * -1 + x * -1) = 21
18 + (2 + -1x) = 21

Combine like terms: 18 + 2 = 20
20 + -1x = 21

Solving
20 + -1x = 21

Solving for variable 'x'.

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

Add '-20' to each side of the equation.
20 + -20 + -1x = 21 + -20

Combine like terms: 20 + -20 = 0
0 + -1x = 21 + -20
-1x = 21 + -20

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

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

Simplifying
x = -1

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