November 2018 1 22 Report

Rozwiąż ukł równań:

 a)\left \{ {{2x+5=7y} \atop {2(x+2)-7y=-1}} \right. b)\left \{ {{6(7x-3y)=10(5x-y)-15(x+y)} \atop {3(x-1)=5(y+1)}} \right.

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