3x-15+x+x-20=180

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Solution for 3x-15+x+x-20=180 equation: 



3x-15+x+x-20=180

We move all terms to the left:

3x-15+x+x-20-(180)=0

We add all the numbers together, and all the variables

5x-215=0

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

5x=215

x=215/5

x=43

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