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November 3rd, 2011, 04:09 AM  #1 
Newbie Joined: Nov 2011 Posts: 1 Thanks: 0  Confusing algebra word problem
Liam's mother donates $4 per mile that Liam walks, plus an additional $30. Liam's father donates $6 per mile that he walks, plus an additional $20. If Liam walks 15 miles, what's total amount mother will donate? What would an equation be for both the mother and the father (individually)? 
November 3rd, 2011, 05:31 AM  #2 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038  Re: Confusing algebra word problem
What grade are you in, Matt?

November 3rd, 2011, 05:50 AM  #3 
Global Moderator Joined: Dec 2006 Posts: 20,927 Thanks: 2205 
There's no point in mentioning or considering the father at all, since the question asks how much the mother will donate, which is $30 plus 15 times $4, i.e., $90 in total.

November 3rd, 2011, 08:53 AM  #4  
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,958 Thanks: 1146 Math Focus: Elementary mathematics and beyond  Re: Confusing algebra word problem Quote:
Mother: a = 4m + 30 Father: b = 6m + 20.  

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