Odpowiedzi

2010-01-20T17:58:14+01:00
A)
{0,02x+0,2y=14 /*100
{x-y=40
2x + 20y = 1400
x=40+y
2(40+y) + 20y = 1400
x=40+y
80 + 2y +20y = 1400
x=40+y
22y = 1320
x=40+y
y = 60
x= 100
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2010-01-20T17:59:41+01:00
0,02x+0,2y=14
x-y=40 / *0,2

0,02x+0,2y=14
0,2x-0,2y=8
--------------------
0,22x=22 / : 0,22
x=100

100-y=40
y=60

x=100
y=60
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