September 2018 2 29 Report

Rozwiąż układ równań metodą podstwiania.

a)\left \{ {{2y-5x=6\atop {-x=-y=6 }} \right

b). \left \{ {{2x-5(y+1)=-5} \atop {-x+2(y+2)=4}} \right

c). \left \{ {{2y-(3+y)=0} \atop {-x+\frac{y}{2}=2


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