Sagot :

Saluuut !

20/(34+x) = (x/2)/1775

20*1775 = (34+x)*(x/2)

35500 = (34x+x²)/2

(35500*2)/2 = (34x+x²)/2

71000 = 34x+x²

-x²-34x+71000 = 0

en esperant t'avoir aidé