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sinta=s
k-2=5(s-2)⇒k-2=5s-10⇒k=5s-8
k+13=3(s+13)⇒k+13=3s+39⇒k=3s+26
maka k=k
5s-8=3s+26
2s=34
s=17 ⇒ k=77
jumlah=94