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Spełnia to a)(2,4)
x+1/2y=4
2+1/2*4=4
2+2=4
Zad2
{2x-3y=5
{-x+1,5y=2,5 /*2
{2x-3y=5
{-2x+3y=5
0=10
Jest to układ sprzeczny c)