1.|5×+1|=|11-2×| 2.|2×+5|=|×+2| Berapakah nilai mutlaknya?

1. |5x + 1| = |11-2x|
⇒5x + 1 = 11 - 2x
7x  = 10
x = 10/7
⇒5x + 1 = -(11 - 2x)
5x + 1 = -11 + 2x
3x = -12
x = -4

2. |2x + 5| = |x + 2|
⇒2x + 5 = x + 2
x = -3
⇒2x + 5 = -(x + 2)
2x + 5 = -x - 2
3x = -7
x = -7/3