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No. Kunci Jawaban Skor

7 1n = 2k 8
3n + 2k = 480.000
3(2k) + 2k = 480.000
8k = 480.000
1k = 60.000
1n = 120.000
2n + 3k = 240.000 + 180.000 = 420.000
Jawaban: B
8 2p + 2l = 94 3
p + l = 47
(5x + 2) + (2x + 3) = 47
7x = 42
x = 6 3
p = 5x + 2 = 32m
l = 2x + 3 = 15m
2 4
L = p X l = 480m
9 Misal bilangan itu x, x + 2, dan x + 4 3
x + (x + 2) + (x + 4) = 90
3x + 6 = 90
x = 28 3
x + 4 = 32
28 + 32 = 60 4

10 a. Obat B ⭢ 2x = 100 x = 50 hari 8
b. Obat A = 3 X 50 – 3 X 12 = 106 butir
Obat C = 1 X 50 = 50 butir 8
c. Harga Obat = (106 X 5.000)
+ (100 X 10.000)
+ (50 * 20.000)
= 530.000 + 1.000.000 + 1.000.000
= Rp2.530.000,00 8

Skor Maksimal 100

MATA PELAJARAN MATEMATIKA — KELAS VII SEMESTER GASAL 49