September 2018 1 19 Report

1.Z podanego wzoru wyznacz "b":

m=\frac{a^{2}+b}{2b}

2.Rozwiąż układ równań:

\left \{ {1-0,3(y-2)=\frac{x+1}{5}\atop {\frac{y-3}{4}=\frac{4x+9}{20}}-1,5} \right

Bardzo proszę o pomoc:(


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