(30+x)+x=180

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Solution for (30+x)+x=180 equation: 



(30+x)+x=180

We move all terms to the left:

(30+x)+x-(180)=0

We add all the numbers together, and all the variables

(x+30)+x-180=0

We add all the numbers together, and all the variables

x+(x+30)-180=0

We get rid of parentheses

x+x+30-180=0

We add all the numbers together, and all the variables

2x-150=0

We move all terms containing x to the left, all other terms to the right

2x=150

x=150/2

x=75

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