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(x/2)*8=4
We move all terms to the left:
(x/2)*8-(4)=0
We add all the numbers together, and all the variables
(+x/2)*8-4=0
We multiply parentheses
8x-4=0
We move all terms containing x to the left, all other terms to the right
8x=4
x=4/8
x=1/2
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