1) 7 1/2: 4 1/2 = х:3/25
х= 3/25*(7 1/2: 4 1/2) = 3/25* (15/2: 9/2) = 3/25* (15/2*2/9) = 3/25*5/3=1/5
2) 24/х+2 = 1/5
х+2 = 24: 1/5 = 24*5 = 120
х=120-2=118
3) у-5/6 = 4/3
у = 4/3+5/6 = 8/6+5/6 = 13/6 = 2 1/6
4) 2/5 = 6/(х+3)
Х+3 = 6: 2/5 = 6*5/2 = 15
х= 15-3 = 12
Пошаговое объяснение:
