Question

How do you solve `\frac { u } { 7} = \frac { 3} { 13}`?

Answer 1

See a solution process below:

Explanation:

Multiple each side of the equation by `color(red)(7)` to solve for `u` while keeping the equation balanced:

`color(red)(7) xx u/7 = color(red)(7) xx 3/13`

`cancel(color(red)(7)) xx u/color(red)(cancel(color(black)(7))) = (color(red)(7) xx 3)/13`

`u = 21/13`