Question

Elizabeth cashed a check for $199. The teller gave her six twenty-dollar bills, x ten-dollar bills, and nineteen one-dollar bills. Find the value of x.

Answer 1

`x=6`

Explanation:

We can set up an equation with the information given:

`6` ·
`20+x` ·
`10+19` ·
`1=199`

We can simplify that to:

`120+10x+19=199`

Which is, simplified further:

`139+10x=199`

If we subtract 139 from both sides of the equation, we will get:

`10x=60`

Thus,
`x=6`.

Hope this helps :)