Question

| x+4 | = 7
cum rezolv asta?​

Answer 1

| x+4 | = 7 <=> x+4=7 sau x+4=-7

x+4=7

x=7-4

x=3

x+4=-7

x=-7-4

x=-11

S={-11;3}

Answer 2

|x+4|= 7 sau -7|-4
x=|x|=3 sau -3
x=3