Question

pessoall me ajudem ? k-(3-k)=1 s= {2}

Answer 1

k - 3 + k = 1
k + k = 1 + 3
2k = 4
k = 2

Answer 2

$k-(3-k)=1\to \\\\\\ k-3+k=1\to \\\\ k+k=1+3\to \\\\ 2k=4\to\\\\ k= \frac{4}{2} \to \\\\ k=2\\\\\\ S=\left \{ 2\left \}$