Răspuns :
x+y=300
x=5y =>y+5y=300 =>6y=300 =>y=50 =>x=250
x+y=920
x=540+y =>2y+540=920 =>2y=380 =>y=190 =>x=630
x=5y =>y+5y=300 =>6y=300 =>y=50 =>x=250
x+y=920
x=540+y =>2y+540=920 =>2y=380 =>y=190 =>x=630
x+y=300
x:y=5
x=5y
5y+y=300
y=300:6
y=50
x=250
x+y=920
x-y=540
920-540=380
380:2=190
x=190+540=730
y=920-730=190
x:y=5
x=5y
5y+y=300
y=300:6
y=50
x=250
x+y=920
x-y=540
920-540=380
380:2=190
x=190+540=730
y=920-730=190