(2x-30)+(3x+20)+90=180

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Solution for (2x-30)+(3x+20)+90=180 equation: 



(2x-30)+(3x+20)+90=180

We move all terms to the left:

(2x-30)+(3x+20)+90-(180)=0

We add all the numbers together, and all the variables

(2x-30)+(3x+20)-90=0

We get rid of parentheses

2x+3x-30+20-90=0

We add all the numbers together, and all the variables

5x-100=0

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

5x=100

x=100/5

x=20

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