( 6 n - 20 ) : 2 = 50 ; n = sama caranya ya mohon dijawab sekarang

(6n - 2) : 2 = 50
6n - 2 = 25
6n = 27
n = 27/6
n = 9/2

(6n-20):2=3n-10

3n-10=50
    3n=50+10
    3n=60
      n=60:3
       n=20