Persamaan nilai mutlak |10x+5|=7

L10x + 5l = 7
*(10x + 5) = 7
   10x + 5 = 7
   10x = 7 – 5
   10x = 2
     x   = 2/10
     x   = 1/5 atau 0,2
*-(10x + 5) = 7
  -10x – 5 = 7
  -10x = 7 + 5
  -10x = 12
     x   = 12/-10
     x   = -1 1/5 atau 1,2

HP = {1/5 , -1 1/5}
atau
HP = {0,2 ; 1,2}