Question

help please
how would you solve for x if
3:12 x:16

Answer 1

\[\large \color {purple}{\frac{ 3 }{ 12 } = \frac{ x }{ 16 }}\]

This is a proportion. So you need to "cross multiply" to get \( \color {blue}{3(16) = 12(x)}\)

Answer 2

Simply and then solve for \(\color{blue}{x}\).