Rozwiaz uklad rownan metoda podstawiania przyklady (A-D) zadanie w zalaczniku
a) 2y-5x=6 <=> 2y-5x=6 <=> 2(x+6)-5x=6 <=> 2x+12-5x=6 <=> -3x=-6/:(-3) -x=-y+6 y=x+6 y=x+6 y=x+6 y=x+6<=> x=2 y=8b) 2x-5(y+1)=-5<=> 2x-5y-5=-5 <=> 2y+4-4=x <=> x=2y <=> x=0 -x+2(y+2)=4 -x+2y+4=4 4y-5y-5=-5 -y=0/*(-1) y=0d) 3x+y=4<=> 3x+y=4 <=> y=4-3x <=> y=4-3x <=> y=4-3x 6x-(1-2y)=8 6x-1+2y=8 6x+2(4-3x)=9 6x+8-6x=9 0= 1układ sprzeczny
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a) 2y-5x=6 <=> 2y-5x=6 <=> 2(x+6)-5x=6 <=> 2x+12-5x=6 <=> -3x=-6/:(-3) -x=-y+6 y=x+6 y=x+6 y=x+6 y=x+6
<=> x=2
y=8
b) 2x-5(y+1)=-5<=> 2x-5y-5=-5 <=> 2y+4-4=x <=> x=2y <=> x=0
-x+2(y+2)=4 -x+2y+4=4 4y-5y-5=-5 -y=0/*(-1) y=0
d) 3x+y=4<=> 3x+y=4 <=> y=4-3x <=> y=4-3x <=> y=4-3x
6x-(1-2y)=8 6x-1+2y=8 6x+2(4-3x)=9 6x+8-6x=9 0= 1
układ sprzeczny