Question

16 Află numărul necunoscut: ax 4 = 84; 3 xa = 90; b: 4 = 16; b:6=24; 69 : c = 3; 80: C = 4; d:6=13; 21:d=3.
​

Answer 1

Răspuns:

ax 4 = 84

a=84:4=>a=21

3 xa = 90

a=90:3=>a=30

b: 4 = 16

b=16×4=>b=64

b:6=24

b=24×6=>b=144

69 : c = 3

c=69:3=>c=13

80: c= 4

c=80:4=>c=20

d:6=13

d=13×6=>d=78

21:d=3

g=21:3=>d=7