解x-(x-1)/3+ 7-(x+3)/5 =0

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解x-(x-1)/3+ 7-(x+3)/5 =0
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解x-(x-1)/3+ 7-(x+3)/5 =0
解x-(x-1)/3+ 7-(x+3)/5 =0

解x-(x-1)/3+ 7-(x+3)/5 =0
去分母     同乘以15得 

 15x-5x+5+105-3x-9=0

101x-3=0    x=     你会做了吧