CALCULATI ; 5x[(3xX+11)x2-19]-5=100 urgent...va rog...multumesc.

Răspuns :

Răspuns:

Explicație pas cu pas:

5[2(3x+11)-19]-5=100

5[2(3x+11)-19]=105

2(3x+11)-19=21

2(3x+11)=21+19

2(3x+11)=40

3x+11=20

3x=9

x=3