Réponses

2014-01-06T19:37:46+01:00
2.5x + 5.6=12
2.5x=12-5.6
2.5x=6.4
x=6.4/2.5
x=64/25=2.56


7.8i-8=1.3i + 2
7.8i-1.3i=2+8
6.5i=10
i=10/6.5
i=100/65
i=20/13