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0.5x+4=20-3.5x
We move all terms to the left:
0.5x+4-(20-3.5x)=0
We add all the numbers together, and all the variables
0.5x-(-3.5x+20)+4=0
We get rid of parentheses
0.5x+3.5x-20+4=0
We add all the numbers together, and all the variables
4x-16=0
We move all terms containing x to the left, all other terms to the right
4x=16
x=16/4
x=4
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