3x + y =3 x= 3-y / 3 log3(5x+4y)=log3(y+5) => (5x+ 4y) -(y+5)=0 5(3-y / 3 ) - y-5 = 0 15-5y : 3 - y-5=0 15-5y-3y-15=0 -8y=0 y=0
3x + y =3 x= 3-y / 3
log3(5x+4y)=log3(y+5) => (5x+ 4y) -(y+5)=0
5(3-y / 3 ) - y-5 = 0
15-5y : 3 - y-5=0
15-5y-3y-15=0
-8y=0
y=0