(20-2x)+(40-2x)+(40-2x)+(40-2x)+(20-2x)=

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Solution for (20-2x)+(40-2x)+(40-2x)+(40-2x)+(20-2x)= equation: 


Simplifying
(20 + -2x) + (40 + -2x) + (40 + -2x) + (40 + -2x) + (20 + -2x) = 0

Remove parenthesis around (20 + -2x)
20 + -2x + (40 + -2x) + (40 + -2x) + (40 + -2x) + (20 + -2x) = 0

Remove parenthesis around (40 + -2x)
20 + -2x + 40 + -2x + (40 + -2x) + (40 + -2x) + (20 + -2x) = 0

Remove parenthesis around (40 + -2x)
20 + -2x + 40 + -2x + 40 + -2x + (40 + -2x) + (20 + -2x) = 0

Remove parenthesis around (40 + -2x)
20 + -2x + 40 + -2x + 40 + -2x + 40 + -2x + (20 + -2x) = 0

Remove parenthesis around (20 + -2x)
20 + -2x + 40 + -2x + 40 + -2x + 40 + -2x + 20 + -2x = 0

Reorder the terms:
20 + 40 + 40 + 40 + 20 + -2x + -2x + -2x + -2x + -2x = 0

Combine like terms: 20 + 40 = 60
60 + 40 + 40 + 20 + -2x + -2x + -2x + -2x + -2x = 0

Combine like terms: 60 + 40 = 100
100 + 40 + 20 + -2x + -2x + -2x + -2x + -2x = 0

Combine like terms: 100 + 40 = 140
140 + 20 + -2x + -2x + -2x + -2x + -2x = 0

Combine like terms: 140 + 20 = 160
160 + -2x + -2x + -2x + -2x + -2x = 0

Combine like terms: -2x + -2x = -4x
160 + -4x + -2x + -2x + -2x = 0

Combine like terms: -4x + -2x = -6x
160 + -6x + -2x + -2x = 0

Combine like terms: -6x + -2x = -8x
160 + -8x + -2x = 0

Combine like terms: -8x + -2x = -10x
160 + -10x = 0

Solving
160 + -10x = 0

Solving for variable 'x'.

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

Add '-160' to each side of the equation.
160 + -160 + -10x = 0 + -160

Combine like terms: 160 + -160 = 0
0 + -10x = 0 + -160
-10x = 0 + -160

Combine like terms: 0 + -160 = -160
-10x = -160

Divide each side by '-10'.
x = 16

Simplifying
x = 16

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