4/7 X- 12 :3/7 X+12 = 2 :
问题描述:
4/7 X- 12 :3/7 X+12 = 2 :
答
4/7 X- 12 :3/7 X+12 = 2 :3
3(4/7 X- 12)=2(3/7 X+12)
12/7X-36=6/7X+24
12/7X-6/7X=24+36
6/7X=60
X=60÷6/7
X=70