Question

x+y=4 2x -3y=3 en graficas

Answer 1

=> x+y=4

x=4-y

=> 2x-3y=3

2x=3+3y

Reemplazamos "x" :

2x=3+3y
2(4-y) =3+3y
8-2y =3+3y
8-3 = 3y+2y
5=5y
1=y

Hallamos "x" :

x=4-y
x=4-1
x=3

Espero te sirva !! ^^