tentukan penyelesaian soal berikut tolong pakai cara

Bab Aljabar
Matematika SMP Kelas VII

3] 2/(x + 1) - 1/x = 4/x
(2 . x - (x + 1)) / (x (x + 1)) = 4/x
2x - x - 1 = 4 (x + 1)
x - 1 = 4x + 4
-1 - 4 = 4x - x
3x = - 5
x =-5/3

4] 2(x + 5) = 3 (2x - 6)
2x + 10 = 6x - 18
10 + 18 = 6x - 2x
4x = 28
x = 28/4
x = 7