August 2018 2 17 Report
A)x-y=4
{x+2y=-7


b)x-y=-1
{4x+3y=2

c){x+4y=1
{x-8y=-1


d) {x+y+z=5
{2x-y+2=3 to wszystko jest w jednej klamerce
{2z+y=11


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