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6x+3y=1 1/4
3x+4y=5/3
6x+3y=5/4
3x=-4y + 5/3 /:3 {obliczasz ile to jest x i pozniej wstawiasz za x do 2 rownania}
6x+3y=5/4
x=-4/3y + 5/9
6(-4/3y + 5/9)+3y=5/4
x=-4/3y + 5/9
-8y+ 30/9 +3y= 5/4
x=-4/3y + 5/9
-5y= 5/4 - 30/9 /:(-5) {obustronnie }
x=-4/3y + 5/9
y= -1/4 + 2/3 po uproszczeniu => y=5/12 {sprowadziłam do wspólnego mianownika}
x=-4/3*(5/12)+ 5/9
y=5/12
x=0
y=5/12