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 = 16
16 + -1x = 21

Solving
16 + -1x = 21

Solving for variable 'x'.

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

Add '-16' to each side of the equation.
16 + -16 + -1x = 21 + -16

Combine like terms: 16 + -16 = 0
0 + -1x = 21 + -16
-1x = 21 + -16

Combine like terms: 21 + -16 = 5
-1x = 5

Divide each side by '-1'.
x = -5

Simplifying
x = -5

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