1)10/7*Х=40/49 2)х*2/5=9/13  3)4/9*х=50/27 4)12/5*х=96/35 5)х*5/6=7/12

1)10/7*Х=40/49;
Х=40/49*7/10; х=4/7;///
2)х*2/5=9/13; х=9/13*5/2;
Х=45/26; х=1 19/26;///
3)4/9*х=50/27; х=50/27*9/4; х=25/6;
Х=4 1/6;///
4)12/5*х=96/35; х=96/35*5/12;
Х=8/7; х=1 1/7;///
5)х*5/6=7/12;
Х=7/12*6/5;
Х=7/10