x*8=800*10 700:x=7*100

х*8=8000х=8000:8х=10001000*8=8000700:х=700х=700:700х=1700:1=700

x*8=800*10x*8=8000x=8000*8x=64000 x*8=800*10x*8=8000x=8000/8x=1000 700/x=7*100700/x=700x=700/700x=1