1.(85-15)/x=35, 2. x*8=810-90, 3. x/(320/4)=6

Question

1.(85-15)/x=35, 2. x*8=810-90, 3. x/(320/4)=6

Answer 1

(85-15):х=35
70:х=35
х=70:35
х=2

Х•8=810-90
х•8=720
х=720:8
х=90

х:(320:4)=6
х:80=6
х=6•80
х=480

Answer 2

2.8х=720
х=90
3
3.х=480