12x-3(x+7)=8x

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Solution for 12x-3(x+7)=8x equation:


Simplifying
12x + -3(x + 7) = 8x

Reorder the terms:
12x + -3(7 + x) = 8x
12x + (7 * -3 + x * -3) = 8x
12x + (-21 + -3x) = 8x

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

Combine like terms: 12x + -3x = 9x
-21 + 9x = 8x

Solving
-21 + 9x = 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
-21 + 9x + -8x = 8x + -8x

Combine like terms: 9x + -8x = 1x
-21 + 1x = 8x + -8x

Combine like terms: 8x + -8x = 0
-21 + 1x = 0

Add '21' to each side of the equation.
-21 + 21 + 1x = 0 + 21

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

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

Divide each side by '1'.
x = 21

Simplifying
x = 21

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