Question

How do you simplify `5x+4+9x`?

Answer 1

`2(7x +2)`

Explanation:

Here,

Since 5 and 9 have same variable `x`, you can add these two. But since 4 has no variable and is different from a term containing x, you cannot add it with other terms.

SO,

=`5x +4 +9x`
= `14x +4`

You can even take a digit common. In this case 2 goes common for both terms so

= `2(7x +2)`