8-(3x-4)=21

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Solution for 8-(3x-4)=21 equation: 


Simplifying
8 + -1(3x + -4) = 21

Reorder the terms:
8 + -1(-4 + 3x) = 21
8 + (-4 * -1 + 3x * -1) = 21
8 + (4 + -3x) = 21

Combine like terms: 8 + 4 = 12
12 + -3x = 21

Solving
12 + -3x = 21

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + -3x = 21 + -12

Combine like terms: 12 + -12 = 0
0 + -3x = 21 + -12
-3x = 21 + -12

Combine like terms: 21 + -12 = 9
-3x = 9

Divide each side by '-3'.
x = -3

Simplifying
x = -3

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