题目内容：

3/7x+1/2x=13 x-1/5x=8/15 4x+5x=18/11

优质解答

1.6/14 X + 7/14 X =13/14X =13
X = 14
2.4/5 X = 8/15
X = 2/3
3.9X = 18/11
X = 2/11
这种题目多做做熟悉熟悉 就会了哦～