Răspunsuri

2014-08-26T15:58:31+03:00
4x=3y
x=3y/4
x/y=3y/4y=3/4
b) 2x-y=6y/4-4y/4=2y/4=y/2
x+y=3y/4+4y/4=7y/4
y/2   /   7y/4=
=4y/14y= 4/14=     2/7