Question

como resolver (4/3-2/5) : (-4/5-1/7)

Answer 1

Oi

(4/3 - 2/5) ÷ (-4/5 - 1/7)

20 - 6/15 ÷ - 28 - 5/35

14/15 ÷ - 33/35

14/15 x - 35/33

- 490/495 ÷ 5

- 98/99

Resposta: - 98/99

Bons estudos

Answer 2

= (4/3-2/5) : (-4/5-1/7)

1a parte:
= (4/3-2/5)

MMC (3,5) = 15
= [(5.4 - 2.3)]/15
= [20 - 6]/15
= 14/15

2a parte:
= (- 4/5 - 1/7)
MMC (5,7) = 35
= [(-4.7 - 1.5)]/35
= [-28 - 5]/35
= - 33/35

= 14/15 : (-33/35)
= 14/15 . (- 35/33)
= - 14.35 / 15.33
= - 490/495 (:5)/(:5)
= - 98/99