Question

Tentukan himpunan penyelesaian berikut:
5n-7=2n+2

Answer 1

5n-7 =2n +2
5n-2n = 2 +7
3n = 9
n = 3

Answer 2

5n-7=2n+2
⇔ 5n – 2n = 2 + 7    
⇔ 3n = 9
⇔ n = 9/3
⇔ n = 3 
HP = { 3 }