2x+y=14 5x+4y=17 to powinno byc w klamże
w takim czyms [
2x+y=14 |*(-4)
5x+4y=17
-8x-4y=-56
_____________
-3x=-39
x=13
2*13+y=14
26+y=14
y=-12
2x+y=14
y=14-2x
5x+4(14-2x)=17
5x+56-8x=17
-3x=17-56
-3x= -39/:(-3)
y=14-2*13
y=14-26
y= -12
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2x+y=14 |*(-4)
5x+4y=17
-8x-4y=-56
5x+4y=17
_____________
-3x=-39
x=13
2*13+y=14
26+y=14
y=-12
x=13
y=-12
2x+y=14
5x+4y=17
y=14-2x
5x+4(14-2x)=17
y=14-2x
5x+56-8x=17
y=14-2x
-3x=17-56
y=14-2x
-3x= -39/:(-3)
y=14-2x
x=13
y=14-2*13
x=13
y=14-26
x=13
y= -12
x=13