tolong jawaban mbak /mas pliisssss

bagian B
1)4x-12y = 4(x-3y)
2)24m+40n = 8(3m+5n)
3)50x-5y+15y+20x = 70x + 10y = 10(7x+y)
4)pqr+4pq-3pr = p(qr+4q-3r)