Question

A share price increased in value one day, doubled that increase the next day, and then decreased $0.12 in value the following day. If the total change was $0.33, by how much did the share go up the first day?

Answer 1

`$0.15`

Explanation:

Let increase in value on day one as x.
Increase on 2nd day is 2x
Decrease on 3rd day is $0.12
`:.` Total change is `x+2x-0.12 = 0.33`
`3x=0.33+0.12=$0.45`
`x=0.45/3=$0.15`