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830=50x+30
We move all terms to the left:
830-(50x+30)=0
We get rid of parentheses
-50x-30+830=0
We add all the numbers together, and all the variables
-50x+800=0
We move all terms containing x to the left, all other terms to the right
-50x=-800
x=-800/-50
x=+16
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