y+4/4 - 3y-9/7 =1/2 contoh dan pakek jalan

[tex] \frac{y + 4}{4} - \frac{3y - 9}{7} = \frac{1}{2} \\ \frac{7y + 28 - 12y + 36}{28} = \frac{1}{2} \\ \frac{ - 5y + 64}{28} = \frac{1}{2} \\ - 10y + 128 = 28 \\ - 10y = 28 - 128 \\ - 10y = - 100 \\ y = \frac{ - 100}{ - 10} \\ y = 10[/tex]