Question

solve the equaction and verify the solution

Answer 1

$\frac{0.1 + 0.7y}{y} = 0.5 \\ 0.1 + 0.7y = 0.5 \times y \\ 0.1 = 0.5y - 0.7y \\ - 0.2y = 0.1 \\ y = - \frac{0.1}{0.2}$