Question

реши уравнения с *6 = 420, 420:а =60, х: 6=70, х *4=280, 360÷х = 90, х ÷7=70

Answer 1

с*6=420
с=420:6
с=70

420:а=60
а=420:60
а=7

х:6=70
х=70*6
х=420

х*4=280
х=280:4
х=70

360:х=90
х=360:90
х=4

х:7=70
х=70*7
х=490