Question 1103354
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My thought for setting up this problem was to use the ages after the 10 years to set up the problem.  Rover will always be 5 years older the Yolanda, so<br>
let x = Yolanda's age after the 10 years
then x+5 is Rover's age then<br>
The problem says 4 times Rover's age at this time is 50 more than twice Yolanda's age:
{{{4(x+5) = 2(x)+50}}}
{{{4x+20 = 2x+50}}}
{{{2x = 30}}}
{{{x = 15}}}<br>
Yolanda's age after the 10 years is 15, so her age at the beginning was 5; that means Rover's age at the beginning was 10.