Problema Solution
Part of the proceeds from a garage sale was $430 worth of $10 and $20 bills. If there were 7 more $10 bills than $20 bills, find the number of each denomination.
Answer provided by our tutors
let $20 bill be x and$10 be x+7
10(x+7) + 20x = 430
10x + 70 + 20x = 430
30x = 360
x = 12
$10 bills = 12+7 = 19
$20 bills = 12