(10x+20)+(10x+20)+(10x+20)=180

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Solution for (10x+20)+(10x+20)+(10x+20)=180 equation: 


Simplifying
(10x + 20) + (10x + 20) + (10x + 20) = 180

Reorder the terms:
(20 + 10x) + (10x + 20) + (10x + 20) = 180

Remove parenthesis around (20 + 10x)
20 + 10x + (10x + 20) + (10x + 20) = 180

Reorder the terms:
20 + 10x + (20 + 10x) + (10x + 20) = 180

Remove parenthesis around (20 + 10x)
20 + 10x + 20 + 10x + (10x + 20) = 180

Reorder the terms:
20 + 10x + 20 + 10x + (20 + 10x) = 180

Remove parenthesis around (20 + 10x)
20 + 10x + 20 + 10x + 20 + 10x = 180

Reorder the terms:
20 + 20 + 20 + 10x + 10x + 10x = 180

Combine like terms: 20 + 20 = 40
40 + 20 + 10x + 10x + 10x = 180

Combine like terms: 40 + 20 = 60
60 + 10x + 10x + 10x = 180

Combine like terms: 10x + 10x = 20x
60 + 20x + 10x = 180

Combine like terms: 20x + 10x = 30x
60 + 30x = 180

Solving
60 + 30x = 180

Solving for variable 'x'.

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

Add '-60' to each side of the equation.
60 + -60 + 30x = 180 + -60

Combine like terms: 60 + -60 = 0
0 + 30x = 180 + -60
30x = 180 + -60

Combine like terms: 180 + -60 = 120
30x = 120

Divide each side by '30'.
x = 4

Simplifying
x = 4

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