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50-x=7x+80
We move all terms to the left:
50-x-(7x+80)=0
We add all the numbers together, and all the variables
-1x-(7x+80)+50=0
We get rid of parentheses
-1x-7x-80+50=0
We add all the numbers together, and all the variables
-8x-30=0
We move all terms containing x to the left, all other terms to the right
-8x=30
x=30/-8
x=-3+3/4
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