Question

A motel clerk counts his $1 and $10 bills at the end of a day. He finds that he has atotal of 56 bills having acombined monetary value of $191. Find the number of bills of each denomination that he has
number of 10's ---- x
number of 1's ------56-x

10x + 1(56-x) = 191
9x = 135
x = 15

he has 15 tens and 41 ones

check:
15(10) + 41 = 191

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