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(20* x/8) - (20* 4/5) = 0*0
4x - 5y = 0
x/2- y/16 = 5,5 | *16
(16* x/2) - (16* 4/16)= 5,5*16
8x- y = 88
x/2-y/16=-5,5 (obie strony mnożymy przez 16)
4x-5y=0
8x-y=-88
4x-5y=0
-y= -88-8x(obie strony mnożymy przez -1)
4x-5y=0
y=8x+88
4x-5(8x+88)=0
y=8x+88
4x-40x-440=0
y=8x+88
-36x= 440
y=8x+88
x= - 440/36= -110/9
x= -110/9
y=8x+88=8* (-110/9)+88= -880/9+792/9= -88/9
x= -110/9
y= - 88/9
Spr.
I równanie
L=4x-5y=4* (-110/9)-5*(-88/9)= -440/9+440/9=0
L=P
Spr.II równania
8x-y=8*(-110/9)-(-88/9)= -880/9+88/9= -792/9= -88
L=P