20=8-2(9-3x)

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Solution for 20=8-2(9-3x) equation:


Simplifying
20 = 8 + -2(9 + -3x)
20 = 8 + (9 * -2 + -3x * -2)
20 = 8 + (-18 + 6x)

Combine like terms: 8 + -18 = -10
20 = -10 + 6x

Solving
20 = -10 + 6x

Solving for variable 'x'.

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

Add '-6x' to each side of the equation.
20 + -6x = -10 + 6x + -6x

Combine like terms: 6x + -6x = 0
20 + -6x = -10 + 0
20 + -6x = -10

Add '-20' to each side of the equation.
20 + -20 + -6x = -10 + -20

Combine like terms: 20 + -20 = 0
0 + -6x = -10 + -20
-6x = -10 + -20

Combine like terms: -10 + -20 = -30
-6x = -30

Divide each side by '-6'.
x = 5

Simplifying
x = 5

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