8x-3(4-x)=21

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


Simplifying
8x + -3(4 + -1x) = 21
8x + (4 * -3 + -1x * -3) = 21
8x + (-12 + 3x) = 21

Reorder the terms:
-12 + 8x + 3x = 21

Combine like terms: 8x + 3x = 11x
-12 + 11x = 21

Solving
-12 + 11x = 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 + 11x = 21 + 12

Combine like terms: -12 + 12 = 0
0 + 11x = 21 + 12
11x = 21 + 12

Combine like terms: 21 + 12 = 33
11x = 33

Divide each side by '11'.
x = 3

Simplifying
x = 3

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