Poll Results
Please login to vote and see the results.
Lost your password? Please enter your email address to get a reset link.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
Explanation:
x can do the work in 12 days
x+5 can do the work in 9 days
x\x+5×12=9
12x = 9x+45 => 3x=45 => x=15