Question

Nina has $245 in 5 dollar bills and ten dollar bills. She has ten more 5 dollar bills than ten dollar bills. How many of each type of bill does she have?

Answer 1

A) 5f + 10t = 245
B) f = t + 10
B) f - t = 10
Multiply B by -5
B) -5f  +5t = -50
A) 5f + 10t = 245

15t = 195
= 13 tens
and 23 fives