Пошаговое объяснение:
1) 2.4х=4.8*3.5
2.4х=16.8
х=16.8:2.4
х=7
2) 2.3х=9.2*2 1/3
2.3x=46/5*7/3
23/10x=322/15
x=322/15*10/23
x=28/3=9 1/3
3) 2.4x=4 1/3*7.2
2.4x=13/3*36/5
12/5x=156/5
x=156/5*5/12
x=13
4 2/7x=2 1/7*3.2
4 2/7x=15/7*16/5
30/7x=48/7
x=48/7*7/30
x=48/30=1 3/5
