Question

Rozwiąż równanie:

| 2 + | x + 1 | | = 5

Answer 1

|x|=|5-2-1|
x=2

Answer 2

|2+(x+1)|=5
|2+x+1|=5 /-2
|2+x+1-2=5-2
|x+1|=3 /-1
|x+1-1|=3-1
x=2