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4+.80x=8+.50x
We move all terms to the left:
4+.80x-(8+.50x)=0
We add all the numbers together, and all the variables
.80x-(.50x+8)+4=0
We get rid of parentheses
.80x-.50x-8+4=0
We add all the numbers together, and all the variables
0.3x-4=0
We move all terms containing x to the left, all other terms to the right
0.3x=4
x=4/0.3
x=13+0.1/0.3
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