Răspunsuri

2014-03-12T08:21:28+02:00
30+5x=3+20x
5x-20x=3-30
-15x=-27  |x (-1)
15x=27
x=27/15
x=9/5


2014-03-12T08:44:01+02:00
30+5x=3+20x
5x-20x=3-30
-15x=-27  |x (-1)
15x=27
x=27/15
x=9/5