Răspuns:
4y-5 / 28 = 3y+15 / 36
<=> 36*(4y-5)=28*(3y+15) <=> 144y-180=84y+420 <=> 60y=600<=> y=10
Sper că te-am ajutat!
[tex] \frac{4y - 5}{28} = \frac{3y + 15}{36} [/tex]
[tex]36(4y - 5) = 28(3y + 15)[/tex]
[tex]144y - 180 = 84y + 420[/tex]
[tex]144y - 84y = 420 + 180[/tex]
[tex]60y = 600[/tex]
[tex]y = \frac{600}{60} [/tex]
[tex]y = 10[/tex]
