Question 1095768
<br>The ratio of the two numbers is 1:2, so
let x be the first number
then 2x is the second number<br>
This is a standard way to start any problem whenever you are given a ratio like this.<br>
Now write and solve the equation that says x+7 and 2x+7 are in the ratio 3:5.  That is,
{{{(x+7)/(2x+7) = 3/5}}}<br>
I leave it to you to finish from here....