Rozwiąż metodą PODSTAWIANIA.
1. 2x+y=3
x-2y=4
2. 2x+5y=8
x+3y=4
3. x+2y=3
2x+3y=7
4. 3x+y=5
2x+4y=8
5. -x+3y=4
2x+3y=1
6. 2x+2y=1
2x-2y=-1
7. 0,2x-0,1y=2
-2x+y=4
8. -2x+3y=0
0,4x_0,6y=0
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