x+(20+x)+90=180

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Solution for x+(20+x)+90=180 equation: 



x+(20+x)+90=180

We move all terms to the left:

x+(20+x)+90-(180)=0

We add all the numbers together, and all the variables

x+(x+20)+90-180=0

We add all the numbers together, and all the variables

x+(x+20)-90=0

We get rid of parentheses

x+x+20-90=0

We add all the numbers together, and all the variables

2x-70=0

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

2x=70

x=70/2

x=35

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