(x+45)+(2x+45)+(3x-30)=180

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Solution for (x+45)+(2x+45)+(3x-30)=180 equation: 



(x+45)+(2x+45)+(3x-30)=180

We move all terms to the left:

(x+45)+(2x+45)+(3x-30)-(180)=0

We get rid of parentheses

x+2x+3x+45+45-30-180=0

We add all the numbers together, and all the variables

6x-120=0

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

6x=120

x=120/6

x=20

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