20=6x-4(-x-9)

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Solution for 20=6x-4(-x-9) equation:


Simplifying
20 = 6x + -4(-1x + -9)

Reorder the terms:
20 = 6x + -4(-9 + -1x)
20 = 6x + (-9 * -4 + -1x * -4)
20 = 6x + (36 + 4x)

Reorder the terms:
20 = 36 + 6x + 4x

Combine like terms: 6x + 4x = 10x
20 = 36 + 10x

Solving
20 = 36 + 10x

Solving for variable 'x'.

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

Add '-10x' to each side of the equation.
20 + -10x = 36 + 10x + -10x

Combine like terms: 10x + -10x = 0
20 + -10x = 36 + 0
20 + -10x = 36

Add '-20' to each side of the equation.
20 + -20 + -10x = 36 + -20

Combine like terms: 20 + -20 = 0
0 + -10x = 36 + -20
-10x = 36 + -20

Combine like terms: 36 + -20 = 16
-10x = 16

Divide each side by '-10'.
x = -1.6

Simplifying
x = -1.6

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