December 2018 1 9 Report
1) x+ 2y= 9
-x - 3y= 16

2) 3x + 2y=13
2x+y= 11

3) 2x-y= 10
x+5y= -17

4) 3m+n = 9
2m -5n= -11
dwa pierwsze poproszę metodą przeciwnych współczynników, a dwa drugie metodą podstawiania, na jutro pilne :* daje najjjj


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