Question

ayuda con esta ecuacion
$12 - \frac{5}{1} r = 2r + 1$

Answer 1

$2 - \frac{5}{1} r = 2r + 1 \\ 2 - 5r = 2r + 1 \\ 2 - 1 = 2r + 5r \\ 1 = 7r \\ \frac{1}{7} = r$