Tolong kak jawab pakek pertanyaannya??

2.
a).
kalikan penyebut dgn 24,
6(2x + 4) – 3(5x) = 4(2x + 4)
12x + 24 – 15x = 8x + 16
-3x + 24 = 8x + 16
-3x – 8x = 16 – 24
-11x = -8
x = 8/11

b).
kalikan penyebut dgn 21,
3x + 7(x – 1) = 2x + 1 – 7
3x + 7x – 7 = 2x – 6
10x – 7 = 2x – 6
10x – 2x = -6 + 7
8x = 1
x = 1/8

c).
kalikan penyebut dgn 10x
2 × 10 – 2 × 2x = 10 + 11x
20 – 4x = 10 + 11x
-4x – 11x = 10 – 20
-15x = -10
x = 10/15
x = 2/3

d).
kalikan penyebut dgn 14x
5 × 2 – 7 × 7 -3(14x) = 3x
10 – 48 – 42x = 3x
-38 – 42x = 3x
-38 = 3x + 42x
-38 = 45x
x = -38/45