Translate into a variable expression then simplify. A number added to the difference between twice the number and four.

Question

pfenn1 · Answer

Let x = a number. Can you write the expression for "a number added to the difference between twice the number and four"?

anonymous · Answer

No. This confuse me.

anonymous · Answer

x+(....)                  1
2x is twice            2
x +(2x-4)            3

anonymous · Answer

I really need help

pfenn1 · Answer

"a number added to the difference between twice the number and four"
          x       +                     -                            2               x              4
So we know the expression has to contain all these numbers and symbols. So the "difference between twice the number and four" implies 2x-4. Can you do it now?

anonymous · Answer

A number added to the difference between twice the number and four.
|              |  |           |                                            |                              |        |  |
        x              +                     (    ? -  ?     )                      2x                         4

  the   2x and 4 go   here               ^

anonymous · Answer

@pfenn so it will be x+2x-4?

anonymous · Answer

it could be that but it is safer to always use perenthesis to   group things together.

anonymous · Answer

ooh and simplify  the q states that 
x +(2x-4)   

add like terms

3x-4

anonymous · Answer

Thanks for the help. Cool