Question

Rezolvati ecuatia :
|x+1| + |2x+2| + |-3x-3|=18

Answer 1

Răspuns:

2 si -4

Explicație pas cu pas:

|2x+2|  = 2 |x+1|

|-3x-3| = 3|x+1|

ecuatia devine

|x+1| +  2 |x+1|  + 3|x+1|  = 18

6|x+1|  = 18

|x+1| = 18 : 6 = 3

x + 1 = 3

x = 3 - 1 = 2

x + 1 = -3

x = -3 - 1 = -4