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-3+5+7=9
-3m-4n+3n+5m dla m =1i n =-2 dla m =-0,5 i n =01
-3+8-1,5+0,5=3
-4x+7=-4*(-1)+7=4+7=11 dla x=-1
-4*2,5+7=-10+7=-3 dla x=2,5
-3m-4n+3n+5m= 2m-n = 2*1-1*(-2)=2+2=4 dla m=1 i n=-2
2m-n=2*(-0,5)-0,1=-1-0,1=-1,1 dla m=-0,5 i n=0,1