A nice algebra problem| Solve for x and y 

A very long method. The same method only but in a precise way. As the problem is of a little advanced level, every minute detail is not necessary. Add 2xy on both sides of equation one. From equation two Put xy = 3-(x+y) in equation one. Then bring everything left and you would get a quadratic equation in (x+y). Solve it. You would get (x+y) = -6 or 3. The rest is same to get the answers

very good channel

Hi, I suggest after solving those values, you should shrink the view and let us see the whole process:)

Почему подставка (а) в зто выражение. Ведь b=3-a, так же гораздо легче.

1️⃣➕22️⃣ （X+Y）^2+3（X+Y）-18=0， （X+Y+6）（X+Y-3）=0，