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20+.50x=30+.30x
We move all terms to the left:
20+.50x-(30+.30x)=0
We add all the numbers together, and all the variables
.50x-(.30x+30)+20=0
We get rid of parentheses
.50x-.30x-30+20=0
We add all the numbers together, and all the variables
0.2x-10=0
We move all terms containing x to the left, all other terms to the right
0.2x=10
x=10/0.2
x=50
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