August 2018 2 78 Report
Układy równań:
a)6x-2y=9
3x+y-4,5=0

b)0,1x-0,2y=0,7
-2x+4y=-14

c)4a-7b=-19
-2x+4y=-14

d)5(x-3y)=-7(3y-x)
-3(x+4)+2(3-5y)=0
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