(1) Svp aidez moi important 15 Pts

5x+2y=12
2y=12-5x
y= 12/2-5/2 x = 6 - 5/2 x = 6 - 2.5x
y = 6 - 2.5x

x+2y=8
2y=8-x
y = 4 - 0.5x

point intersection (1 ; 3.5)

6 - 2.5x = 4 - 0.5x
-2.5x+0.5x = 4+-6
-2x = -2
x=1
y=4-0.5 *1 =3.5
on retrouve les coordonnée du point d'intersection