Rozwiąz uklady równan :a){x-y=2{0,5-1=1/4 yb){-x-y=2{2(3x+y)=-20c){4x+3y=54{1/3x-4(1+1/8y)
a) niewiem
b) {-x-y=2
{6x+2y=-20
{-x-y=2 /razy 6
{-6x-6y=6
-4y=-14/:-4
y=3i dwie czwarte
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a) niewiem
b) {-x-y=2
{6x+2y=-20
{-x-y=2 /razy 6
{6x+2y=-20
{-6x-6y=6
{6x+2y=-20
-4y=-14/:-4
y=3i dwie czwarte