Question

URGENTTTT!!!Rezolvati in Q ecuatiaURGENTTTT!!!

Rezolvati in Q ecuatia

1.   |18 -x|=3.24
2.   |3x+9|=-6
3.   |0.01x-0.02|=0

Dau cel mai bun raspuns,va rog urgent!  va rog cu explicatii

Answer 1

|18-x|=x-18 daca x<18
           18-x daca x>0
x<18
x-18=3,24
x=18+3,24=21,24=2124/100=1062/50=531/25
daca x>18
18-x=3,24
x=15,24
x=1524/100=762/50=381/25
2)|3x+9|=-3x-9 daca x<-3
                 3x+9,daca x>3
-3x-9=-6
-3x=9-6=3
x=-1/1
3x+9=-6
3x=-15
x=-5/1
3) |0,01x-0,02|= -0,01x+0,02 ,daca x<2
                            0,01x-0,02,daca x>2
2/100-x/100=0
2-x=0
x=2=2/1
x/100-2/100=0
x=2/1 
numarul 5 de exemplu se scri ca un numar din Q astfel
5=5/1=10/2=15/3