Question

7•x=420 x:5=150 x•3=720

Answer 1

7*х=420
х=420/7
х=60

х/5=150
х=150*5
х=750

х*3=720
х=720/3
х=240

Answer 2

х=420:7
х=60

х=150×5
х=750

х=720:3
х=240