Question

УМОЛЯБ ПОМОГИТЕ надо найти звездочку

Answer 1

$\dfrac{10k-4}{3-10k}+\dfrac{*}{3-10k}=1\\\\\dfrac{10k-4+*}{3-10k}=1\\\\10k-4+*=3-10k\\20k+*=7\\ *=7-20k$