8-(3+2x)=21

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Solution for 8-(3+2x)=21 equation: 


Simplifying
8 + -1(3 + 2x) = 21
8 + (3 * -1 + 2x * -1) = 21
8 + (-3 + -2x) = 21

Combine like terms: 8 + -3 = 5
5 + -2x = 21

Solving
5 + -2x = 21

Solving for variable 'x'.

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

Add '-5' to each side of the equation.
5 + -5 + -2x = 21 + -5

Combine like terms: 5 + -5 = 0
0 + -2x = 21 + -5
-2x = 21 + -5

Combine like terms: 21 + -5 = 16
-2x = 16

Divide each side by '-2'.
x = -8

Simplifying
x = -8

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