Bantuin kak sama cara dapetnya gimana

|2x-a| < 5
- 5 < 2x - a < 5
-5 + a < 2x < 5 + a
(-5 + a)/2 < x < (5 + a)/2

(-5 + a) /2 = -1
-5 + a = -2
a = 3

smg membantu