Réponses

2014-06-01T16:33:32+02:00
-3 k + 0,2 =  \frac{5}{7} k - 4,8

-> 0,2 + 4,8 =  \frac{5}{7} k + 3 k
-> 5 =  \frac{5}{7} k +  \frac{21}{7} k
-> 5 =  \frac{26}{7}
-> 5 -  \frac{26}{7} = k
-> k = 5 -  \frac{26}{7}
-> k =  \frac{35}{7}  \frac{26}{7}
-> k =  \frac{9}{7}