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3k*2=5(k+2)
6k-5k=10
k=10
a=3k*2=3*10*2=60=współczynnik
b]
3*5k=6(k-2)
15k-6k=-12
9k=-12
k=-12/9
k=-4/3
a=5k*3=5*(-4/3)*3=-20
c]
8(9+k)=4*20k
72+8k=80k
72=72k
k=1
a=8*(9+k)=8*(9+1)=80