Odpowiedzi

2010-02-14T15:58:17+01:00
10y+20+3x-15=x-5
25y+50+3x-15=-10

10y=-2x-10
25y+50+3x-15=-10

y=-0,2x-1
-5x-25+50+3x-15=-10

y=-0,2x-1
-2x=-30

y=-0,2x-1
x=15

y=-2
x=15

powino byc dobrze
2010-02-14T15:59:57+01:00
10(y+2)+3(x-5)=x-5
25(y+2)+3(x-5)= -10
19y+20+3x-15= x-5
25y+50+3x-15= -10
19y+2x-=-10/:2
20y+3x=-45