September 2018 2 21 Report

Prosze o pomoc pilnie na dzis prosze was pomozcie
rozwiąż układy równań
1)
c)\left \{ {{x-y=15} \atop {y=4x}} \right
d)\left \{ {{y=-2x-1} \atop {x=y+7}} \right
2)
a)\left \{ {{x+y=0} \atop {x-y=10}} \right
c)\left \{ {{12p-7r=-16} \atop {p-3r=-69}} \right
e)\left \{ {{8a+9b=36} \atop {a-16b=210}} \right
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