x+(2x-21)+90=180

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Solution for x+(2x-21)+90=180 equation: 



x+(2x-21)+90=180

We move all terms to the left:

x+(2x-21)+90-(180)=0

We add all the numbers together, and all the variables

x+(2x-21)-90=0

We get rid of parentheses

x+2x-21-90=0

We add all the numbers together, and all the variables

3x-111=0

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

3x=111

x=111/3

x=37

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