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2014-04-28T20:38:36+03:00
Y=2x+7
y=3(x-2)
rezulta 2x+7=3x-6

2) x=7y+18
x=9(y-4)
Rezulta 7y+18=9y-36



y=2x+7
y=3(x-2)
2x+7=3(x-2)
2x+7=3x-6
7-6=3x-2x
1=x
x=1
2)x=7y+18
x=9(y-4)
7y+18=9(y-4)
7y+18=9y-36
18+36=9y-7y
54=2y
y=54/2
y=26