Question

Dan is twice the height of his sister Julie plus four inches. Dan is 72 inches tall. How tall is Julie?

Answer 1

34 inches

Explanation:

Let’s make J represent Julie’s height

Since Dan is two times plus 4 inches the height of Julie, an expression that could represent this is 2J +4

Dan is a total of 72 inches, so we can use this info to find J. The expression should look something like this:

`72=2J +4`

Isolate J to find Julie’s height, so you would want to start by subtracting 4 on both sides then divide both sides by 2.

`72-4 = 2J+4-4`

`68 = 2J`

`68/2 = 2J/2`

`34 = J`

Since, once again, J represents Julie, Julie’s height is 34 inches