Question

How do you solve `1/10 = 3/q`?

Answer 1

Multiply both sides by `(10q)` to get
`color(white)("XXX")q=30`

Explanation:

Given `color(red)(1/10)=color(blue)(3/q)`

then `color(red)(1/cancel(10))xx(cancel(10)q)/color(white)("") = color(blue)(3/cancel(q))xx(10cancel(q))/color(white)("")`

`color(white)("XXX")q=30`