Answer: 14 miles and the donors will both owe $35 for a total of $70
Explanation:
The mother is giving $35 and the grandmother is 2.50 per mile and at the end they both end up owing the same amount
grandmothers 2.50 per miles
you walk 14 miles
you multiply 2.50 and 14 to get $35
The mother and the grandmother both owe $35
so take $35x2= 70