Simplify
3x-1/5 -x/7=3
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3x-1/5-x/7=3
3x-1/5-x/7-3=0
3x-7/35-5x/35-3=0
(105x-7-5x-105)/35=0
100x-112=0
100x=112
x=112/100
x=1.12
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