2x+5y supra 7x+2y=3 supra 4

vog..repede


Răspuns :

2x+5y/7x+2y=3/4

4(2x+5y)=3(7x+2y)

8x+20y=21x+6y

20y-6y=21x-8x

14y=13x

x/y=14/13