а)15/x=5/8
5x = 15·8
x = 3·8
x = 24
б)24/x=8/7
8x = 24·7
х = 3·7
х = 21
в)12/x=4/5
4х = 12·5
х = 3·5
х = 15
г)25/x=5/7
5х = 25·7
х = 5·7
х = 35
a) 5x=120,x=24.б)8x=168,x=21.
в)4x=60,x=15.
г)5x=175,x=35.
