5x + 5x - x + 8y - 4y =
(5x + 5x - <span>x) + (8y - 4y) =
(9x) + (4y) =
9x + 4y
</span>

<span>
</span>
Final number of white sheep = 5 - 2 =3
Final number of black sheep = 7 - 2 = 5
ANSWER product = 3*5 = 15
<span>c = w * t*k
</span><span>198 = 220*5k
</span><span>198------ = k = .18220(5)
c = .18(175)(6) = 189
</span>