2x-45+x-15+x+20=180

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Solution for 2x-45+x-15+x+20=180 equation: 



2x-45+x-15+x+20=180

We move all terms to the left:

2x-45+x-15+x+20-(180)=0

We add all the numbers together, and all the variables

4x-220=0

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

4x=220

x=220/4

x=55

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