Question

ТОКО ! 5d+16d=189(d= ) 78d−45d=144(d= ) 564d+d−342d=1115(d= ) 23d−35=449(d= )

Answer 1

Пошаговое объяснение:

5d+16d=189;  21d=189

(d=9)

78d−45d=144;  33d=144

(d=144/33=4 12/33)

564d+d−342d=1115; 223d=1115

(d=5)

23d−35=449;  23d=484

(d=21 1/23 )

Answer 2

Пошаговое объяснение:

5d + 16d = 189

21d = 189

d = 189 : 21

d = 9

78d - 45d = 144

33d = 144

d = 144 : 33

d = 144/33

d = 4. 12/33

564d + d - 342d = 1115

223d = 1115

d = 1115 : 223

d = 5

23d - 35 = 449

23d = 449 + 35

23d = 484

d = 484 : 23

d = 484/23

d = 21. 1/23