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.50x+.35x=13.45
We move all terms to the left:
.50x+.35x-(13.45)=0
We add all the numbers together, and all the variables
0.85x-13.45=0
We move all terms containing x to the left, all other terms to the right
0.85x=13.45
x=13.45/0.85
x=15+0.7/0.85
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