Jawaban:

7. B

8. B

9. D

10. A

Penjelasan dengan langkah-langkah:

nomer 7

2 (6x - 3) >= 3 (2(x+3))

12x - 6 >= 3 (2x + 6)

12x - 6 >= 6x + 18

12x - 6x >= 18 + 6

6x >= 24

x >= 4

jawaban B

nomer 8

1/2t - 1 < 1/3 (t - 4)

1/2t - 1 < 1/3t - 4/3

1/2t -1/3t < - 4/3 + 1

3/6t - 2/6t < -8/6 + 6/6

1/6t < -2/6

1t < -2

t < -2

jawaban B

nomer 9

(t-2)/4 - (t-4)/6 <= 2/3

(3(t-2) / 12) - (2(t-4) / 12) <= 8/12

(3t/12 - 6/12) - (2t/12 - 8/12) <= 8/12

3t/12 - 2t/12 - 6/12 + 8/12 <= 8/12

t/12 + 2/12 <= 8/12

t/12 <= 8/12 - 2/12

t/12 <= 6/12

t <= 6

jawaban D

nomer 10

(2m/3) - ((3m-14)/5) > 0

2m/3 - 3m/5 + 14/5 > 0

10m/15 - 9m/15 + 42/15 > 0

m/15 + 42/15 > 0

m/15 > -42/15

m > -42

{-41, -40, -39, ......}

jawabannya A