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100=7x-3
We move all terms to the left:
100-(7x-3)=0
We get rid of parentheses
-7x+3+100=0
We add all the numbers together, and all the variables
-7x+103=0
We move all terms containing x to the left, all other terms to the right
-7x=-103
x=-103/-7
x=14+5/7
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