5x + 6 = 2x + 21 tentukan nilai x​

5x + 6 = 2x + 21

5x – 2x = 21 – 6

3x = 21 – 6

3x = 15

x = 15/3

x = 5

5x + 6 = 2x + 21

5x – 2x = 21 – 6

3x = 15

x = 15/3

x = 5