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7=8x-30
We move all terms to the left:
7-(8x-30)=0
We get rid of parentheses
-8x+30+7=0
We add all the numbers together, and all the variables
-8x+37=0
We move all terms containing x to the left, all other terms to the right
-8x=-37
x=-37/-8
x=4+5/8
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