équation
Posté : mer. 13 avr. 2011 17:03
je dois résoudre l'équation suivante :
2/5 x + 3/14 = 3/10 x - 1/7
2/5 x + 3/14 = 3/10 x - 2/14
2/5 x = 3/10 x -2/14 - 3/14
2/5x = 3/10 x - 5/14
2/5 x - 3/10 x = -5/14
4/10 x - 3/10 x = -5/14
1/10 x = - 5/14
x = -5/14 / -1/10
x = -50/14
x = - 25/7
j'ai bon ???? merci
2/5 x + 3/14 = 3/10 x - 1/7
2/5 x + 3/14 = 3/10 x - 2/14
2/5 x = 3/10 x -2/14 - 3/14
2/5x = 3/10 x - 5/14
2/5 x - 3/10 x = -5/14
4/10 x - 3/10 x = -5/14
1/10 x = - 5/14
x = -5/14 / -1/10
x = -50/14
x = - 25/7
j'ai bon ???? merci