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0.5(x-20)=4
We move all terms to the left:
0.5(x-20)-(4)=0
We multiply parentheses
0.5x-10-4=0
We add all the numbers together, and all the variables
0.5x-14=0
We move all terms containing x to the left, all other terms to the right
0.5x=14
x=14/0.5
x=28
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