resoudre (  2/ x+3 ) - 1/x =2

(2/x + 3) - 1/x = 2
(2/x + 3) -1/x x x [<< 1/x fois x] = 2x
(2/x + 3) -1 = 2x
(2/x + 3) - 1 + 1 = 2x + 1
2/x + 3 = 2x + 1
2/x + 3 - 3 = 2x + 1 - 3
2/x = 2x - 2
2x - 2 = 2/x
2x x x [<< 2x fois x] = 2/x x x
2x2 [<< 2x au carre] = 2
2x2/2 = 2/2
x2 = 1
Racine de x au carré = racine de 1
Donc x = 1


Voilà !