Question

Gasiti x,daca {x,3} sunt invers proportionale cu {5,x+6}

Answer 1

5·x = 3·( x + 6) 
5·x = 3·x + 18 
5·x - 3·x = 18 
2·x = 18 
x = 9 

Answer 2

inseamna ca x/1/5=3/1/x+6
=>5x=3x+18
2x=18
x=9