15(3-2y)-4(9-y)=3(y+5)
45 – 30y – 36 + 4y = 3y + 15
– 30y + 4y – 3y = 15 + 36 – 45
-29y = 6
y = 6/-29
y =-0,20689655172
15(3-2y)-4(9-y)=3(y+5)
45 – 30y – 36 + 4y = 3y + 15
– 30y + 4y – 3y = 15 + 36 – 45
-29y = 6
y = 6/-29
y =-0,20689655172