pliss jawab dong nanti aku jadiin jawaban terbaik

1. 3a/7 + 6 = 2
<=> 3a/7 = -4
<=> 3a = -28
<=> a = -28/3

2. a/2 + a + 8 = 14
<=> 3a/2 = 6
<=> 3a = 12
<=> a = 4

3. a/5 + 2a/3 + 6 = 19
<=> 13a/15 = 13
<=> 13a = 195
<=> a = 15

4. a/2 + a/3 -8 = 7
<=> 5a/6=15
<=> 5a = 90
<=> a = 18

Mohon sambil dikoreksi, Terima kasih ^^