15/()-5/2=15/()-()/()=3/1
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15/()-5/2=15/()-()/()=3/115/()-5/2=15/()-()/()=3/1 15/()-5/2=15/()-()/()=3/115/11-5/2=15/6-15/1
15/()-5/2=15/()-()/()=3/1
15/()-5/2=15/()-()/()=3/1
15/()-5/2=15/()-()/()=3/1
15/11-5/2=15/6-15/1=3/1
15/()-5/2=15/()-()/()=3/1
():15=2/5=18÷()=()%
求解方程(15+x)/(5+x)=2
5cm :15km=():()
(2x+15):(5x+15)=3:5
():15=40/()=2÷5=14:()=():20
():15=():40=2/5=14:()=():20
2/5*(x-15)=43/5 解方程
简算.5/3-(15/2+3/1)5/3-(15/2+3/1) ==
30*(1&2+2&5-7&15)=
2除以多少等于3?2:()=15:5
(4/5-2/3)*15/2=?
3(2/5x-15)=3/5+15 右边是3/5x+15.
2/5=8分之几=15:()=()%=()折
()÷5=12/()=()/15=0.6=15÷()
1、|(11/12)-(12/13)|+|(12/13)-(13/14)|+|(13/14)-(14/15)|+|(14/15)-(15/16)|2、0.0125*(16/5)-(1/7)*(-87.5)/(15/16)*(16/15)+(-2)²-43、(1/2)+1+(1/2)=2,(1/3)+(2/3)+1+(2/3)
2又4/9=()/9=()/27 15/()=3/5=()/15 3=()/3=6/()
5分之2=()除以15=():()=()分之8=()乘3分之2