Question

Aflati-l pe x astfel incat :
{[(5,5*x+9)/40]*0,7-0,33}*5+9,9=10
Multumesc din suflet.

Answer 1

{[(5,5*x+9)/40]*0,7-0,33}*5=10-9,9=0,1

{[(5,5*x+9)/40]*0,7-0,33}=0,1:0,5=0,2

[(5,5*x+9)/40]*0,7=0,2+0,33=0,53

(5,5*x+9)/40=0,53:0,7=0,75

5,5*x+9=0,75*40=30,28

5,5x=30,28-9=21,28

5,5x=21,28

x=21,28:5,5

x=3,87