di ketahui nilai p=2/3,q=3/4 dan r=pq/2p tentukan nilai dari= a.(p+q)-(q+r) b.pq/p+r-q please jawab penting...... please......

kayaknya seperi ini..

a.)
(p + q) - (q + r)
→ (2/3 + 3/4) - (3/4 + (2/3 . 3/4 /2(2/3)))
→ (8/12 + 9/12) - (3/4 + (1/2 / 4/3))
→ (17/12 ) - (3/4 + (1/2 x 3/4))
→ (17/12) - (3/4 + 3/8)
→ (17/12) - (6/8 + 3/8)
→ 17/12 - 9/8
→ 34/24 - 27/24
→ 7/24

b.)
r → pq/2p
r → (2/3 . 3/4 / 2(2/3))
r → 3/8

pq/p+r-q
→ (2/3 . 3/4) / (2/3 + 3/8 - 3/4)
→ (6/12 ) / (16/24 + 9/24 - 18/24)
→ (6/12) / (7/24)
→ 6/12 x 24/7
→ 144/84
→ 12/7
→ 1 5/7