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0.5x+20=4x+30
We move all terms to the left:
0.5x+20-(4x+30)=0
We get rid of parentheses
0.5x-4x-30+20=0
We add all the numbers together, and all the variables
-3.5x-10=0
We move all terms containing x to the left, all other terms to the right
-3.5x=10
x=10/-3.5
x=-2+1/1.1666666666667
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