Question

Mary and Tina spent a total of $175 at the mall. Tina spent $10 more than twice as much as Mary. How much did tina spend?

Answer 1

I found `$120`

Explanation:

Call the amount of money spent by Mary and Tina as `M` and `T` you get:
`M+T=175`
`T=10+2M`
substitute the second into the first:
`M+10+2M=175`
solve for `M`:
`M=165/3=55` $
so that for Tina we have:
`T=10+2*55=120` $