4(2-x)=20

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Solution for 4(2-x)=20 equation: 


Simplifying
4(2 + -1x) = 20
(2 * 4 + -1x * 4) = 20
(8 + -4x) = 20

Solving
8 + -4x = 20

Solving for variable 'x'.

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

Add '-8' to each side of the equation.
8 + -8 + -4x = 20 + -8

Combine like terms: 8 + -8 = 0
0 + -4x = 20 + -8
-4x = 20 + -8

Combine like terms: 20 + -8 = 12
-4x = 12

Divide each side by '-4'.
x = -3

Simplifying
x = -3

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