Répondre :
212.50 =3(3x))+2(3x)+2x
212.50= 9x+6x+2x
212.50 = 17x
X=212.50/17
X= 12.5
X=dvd
212.50 = 3x+2(x/3)+2x
212.50 = 3x+ 2x/3 + 2x
212.50 = 5x+2x/3
212.50= 9x+6x+2x
212.50 = 17x
X=212.50/17
X= 12.5
X=dvd
212.50 = 3x+2(x/3)+2x
212.50 = 3x+ 2x/3 + 2x
212.50 = 5x+2x/3