C•8=640; 640:a=8; x:8=80

Question

C•8=640; 640:a=8; x:8=80

Answer 1

1) с=640:8
с=80
2) а=640:8
а=80
3) х=80х8
х=640

Answer 2

С×8=640 640:а=8 х:8=80
с=640:8 а=640:8 х=80×8
с=80 а=80 х=640