SOLUTION: roy is 15 and his mother is 45. in how many years will roy's mother be twice as old

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Question 1030666: roy is 15 and his mother is 45. in how many years will roy's mother be twice as old
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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roy is 15 and his mother is 45.
in how many years will roy's mother be twice as old
:
let y = no. years for this to be true
y + 45 = 2(y+15)
y + 45 = 2y + 30
45 - 30 = 2y - y
15 = y
;
In 15 years mom will be twice as old as Roy
:
:
Check
45 + 15 = 60
15 + 15 = 30