Question

Tentukan penyelesaian persamaan berikut :
1. 4d + 6 = d
2. 10 (p - 6) =-5p
3. 5 (6 - r) +1= p+1

Answer 1

1. 4d + 6 = d 4d + 6 - 6 = d - 6 4d = d - 6 4d - d = d- d -6 3d = -6 3d : 3 = -6 : 3 d = -2

Answer 2

Yang nomor 1
4d + 6 = d
4d - d = - 6
     3d = - 6
       d = - 6/3
       d = - 2

Yang nomor 2
10 (p - 6) = - 5p
10(p) + 10(- 6) = - 5p
10p - 60 = - 5p
10p + 5p = 60
        15p = 60
           p = 60/15
           p = 4
    
Yang nomor 3
5 (6 - r) + 1= p + 1
5(6) + 5(- r) + 1 = p + 1
30 - 5r + 1 = p + 1
- 5r + 31 = p + 1
- p - 5r = 1 - 31
- p - 5r = - 30