Question

помогите .................

Answer 1

72*x=240*3

72*x=720

x=720:72

x=10

y:1=290*3

y:1=870

y=870*1

y+870

z*96=120*8

z*96=960

z=960:96

z=10

850:x=170*5

850:x=850

x=850:850

x=1