Penyelesaian dari 1/2 (x - 4) = 4 + 4/5 x adalah

jawab

1/2 (x -  4) = 4 + 4/5 x....kali 10
5(x - 4) = 40 + 8x
5x - 20 = 40 + 8x
5x -8x = 40+20
-3x = 60
x = - 20

1/2 (x-4) = 4 + 4/5x
1/2x - 2 = 4 + 4/5x
1/2x - 4/5x = 4+2
5/10x - 8/10x = 6
-3/10x = 6
x = 6. -10/3
x = -20