Question

calcule o valor de x, me ajudem por favor​

Answer 1

A) 15•x = 5•21

15•x = 105

x= 105/15

x = 7

B)x•4 = 3•12

x•4 = 36

x = 36/4

x = 9

C) 8•x = 4•9

8•x = 36

x = 36/8

x = 4,5