Question

What is `3d + ( 5- d )` if `d = 4`?

Answer 1

`13`

Explanation:

`"substitute "d=4" into the expression"`

`(3xxcolor(red)(4))+(5-color(red)(4))`

`=12+1=13`

Answer 2

`3d+(5-d)=3d+5-d=2d+5`

If `d=4` then `2xx4+5=8+5=13`