-8(2x-9)=20-21x

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Solution for -8(2x-9)=20-21x equation:


Simplifying
-8(2x + -9) = 20 + -21x

Reorder the terms:
-8(-9 + 2x) = 20 + -21x
(-9 * -8 + 2x * -8) = 20 + -21x
(72 + -16x) = 20 + -21x

Solving
72 + -16x = 20 + -21x

Solving for variable 'x'.

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

Add '21x' to each side of the equation.
72 + -16x + 21x = 20 + -21x + 21x

Combine like terms: -16x + 21x = 5x
72 + 5x = 20 + -21x + 21x

Combine like terms: -21x + 21x = 0
72 + 5x = 20 + 0
72 + 5x = 20

Add '-72' to each side of the equation.
72 + -72 + 5x = 20 + -72

Combine like terms: 72 + -72 = 0
0 + 5x = 20 + -72
5x = 20 + -72

Combine like terms: 20 + -72 = -52
5x = -52

Divide each side by '5'.
x = -10.4

Simplifying
x = -10.4

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