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0.8x-13=0.6x+15
We move all terms to the left:
0.8x-13-(0.6x+15)=0
We get rid of parentheses
0.8x-0.6x-15-13=0
We add all the numbers together, and all the variables
0.2x-28=0
We move all terms containing x to the left, all other terms to the right
0.2x=28
x=28/0.2
x=140
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