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4=8x-40
We move all terms to the left:
4-(8x-40)=0
We get rid of parentheses
-8x+40+4=0
We add all the numbers together, and all the variables
-8x+44=0
We move all terms containing x to the left, all other terms to the right
-8x=-44
x=-44/-8
x=5+1/2
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