(21-3х)÷(2х-14)=?(72-6аb)÷(5ab-60)=?

Question

(21-3х)÷(2х-14)=?
(72-6аb)÷(5ab-60)=?

Answer 1

(21-3x) -3(x-7)
———- = ———— = -1,5
(2x-14) 2(x-7)

(72-6ab) -6(ab-12)
————- = ————— = -1,2
(5ab-60) 5(ab-12)