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0.35+x-0.35x=0.87
We move all terms to the left:
0.35+x-0.35x-(0.87)=0
We add all the numbers together, and all the variables
0.65x-0.52=0
We move all terms containing x to the left, all other terms to the right
0.65x=0.52
x=0.52/0.65
x=0.52/0.65
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