300+2x+x=180

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Solution for 300+2x+x=180 equation: 



300+2x+x=180

We move all terms to the left:

300+2x+x-(180)=0

We add all the numbers together, and all the variables

3x+120=0

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

3x=-120

x=-120/3

x=-40

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