Rozwiąż układ równań!! Bardzo pilne!!!Daje naj !!![latex] left { {{4(x+y)=10-y} atop {6-y-x=8(x+y)-21}} ight. [/latex]

4x+4y=10-y 6-y-x=8x+8y-21 4x+5y=10 -9y-9x=-27/: (-9) 4x+5y=10 x+y=3/*(-4) 4x+5y=10 -4x-4y=-12 +---------------- y=-2 x=5

4 ( x+y)= 10-y6-y-x=8 ( x+y)-21--------4x+4y=10-y6-y-x= 8x+8y-21------4x+5y=10-9x-9y=-27-----4x+5y=10-9x=-27+9y  / calosc : (-9)---4x+5y=10x= 3- y---- 4 *( 3-y) +5y=10x=3-y----12-4y+5y=10x=3-y---y=-2x= 3 -(-2)---------y=-2x=5