Odpowiedzi

2010-02-24T18:06:34+01:00
0,03x+0,05y=0,12*12 / * 100
x+y =12 Uklad rownan


3x+5y=12*12
x=12-y

3(12-y)+5y=144
x=12-y


36-3y+5y=144
x=12-y

2y= 144-36
x=12-y

2y=108/:2
x=12-y


y=54
x-=12-54

y=54
x=-42