Question

4x-5y=r solve y if x=3 and r=16

Answer 1

$\: solve - - > 4x + 5y = r \\ \\ ans. \: \: first \: put \: value \: of \: r \: an \: x \\ \\ = > 4(3) - 5y = 16 \\ \\ = > 12 - 5y = 16 \\ \\ = > - 5y = 16 - 12 \\ \\ = > - 5y = 4 \\ \\ = > y = \frac{4}{ - 5} \: \: \: \: \: ans...$