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a){x+y=7
{x-y=3
b){a=10b
{b=a/10
c){x=y+3
{1/2x+6=y
d){a*b=12
{2a+2b=14
e){x+y=4
{y=3x
zadanie 2
a){x+y=22
{x=0.2x+y
b){x+y=24
{x=0.3y
c){x+y=2,25
{1,2x+1,05y=2,40
zadanie3
a)Tak
b)nie
c)Tak
c)nie
zadanie4
a){x+y=4
{2x-3y=3
b){-x+y=3
{x-5y=-11
c){10x+2y=8
{4y-3,5x=32