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3x-4+2x+1+x+4=180
We move all terms to the left:
3x-4+2x+1+x+4-(180)=0
We add all the numbers together, and all the variables
6x-179=0
We move all terms containing x to the left, all other terms to the right
6x=179
x=179/6
x=29+5/6
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