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.66x+.75x+x=57
We move all terms to the left:
.66x+.75x+x-(57)=0
We add all the numbers together, and all the variables
2.41x-57=0
We move all terms containing x to the left, all other terms to the right
2.41x=57
x=57/2.41
x=23+1/1.5350318471338
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