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

х*8=8000
х=8000:8
х=1000
1000*8=8000

700:х=700
х=700:700
х=1
700:1=700

x*8=800*10
x*8=8000
x=8000*8
x=64000
 
x*8=800*10
x*8=8000
x=8000/8
x=1000
 
700/x=7*100
700/x=700
x=700/700
x=1