1-(10/21-3/14) 3/8+(11/12-7/20) 2/3-7/12+4/5 x-3/8-1/8=11/18 2/3-x-1/4=1/3 2x-6/7=1/77/9-x+5/6=1又 5/18 x+5/12=1/2+5/9 要过成
问题描述:
1-(10/21-3/14) 3/8+(11/12-7/20) 2/3-7/12+4/5 x-3/8-1/8=11/18 2/3-x-1/4=1/3 2x-6/7=1/7
7/9-x+5/6=1又 5/18 x+5/12=1/2+5/9 要过成
答
1-(10/21-3/14) =1-(20/42-9/42)=1-11/42=31/423/8+(11/12-7/20)=3/8+55/60-21/60=3/8+34/60=3/8+17/30=45/120+68/120=113/1202/3-7/12+4/5 =8/12-7/12+4/5=1/12+4/5=5/60+48/60=53/60x-3/8-1/8=11/18x=11/18+1/2=11...