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66=50-x
We move all terms to the left:
66-(50-x)=0
We add all the numbers together, and all the variables
-(-1x+50)+66=0
We get rid of parentheses
1x-50+66=0
We add all the numbers together, and all the variables
x+16=0
We move all terms containing x to the left, all other terms to the right
x=-16
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