rezolvati in R ecuatia

Rezolvati In R Ecuatia class=

Răspuns :

√(3x+7)=8+13

|3x+7|=21

1_ 3x+7=-7

3x=-7-7

3x=-14

x=-14/3

2. 3x+7=7

3x=7-7

3x=0

x=0