Qx2+4
If the number is represented by X, then '4 more than a number' is represented by (X+4).
n - 4
You would write it as x/3 -4, where x is whatever the number is.
9+(x/4)=12 x/4=3 x=12
2n>4
n - 4 = 19
5x-4
Four more than three times a number
p+4.
4 + x > 13.
11