Question

How do you simplify `x + 9x + 3`?

Answer 1

`=10x+3`

Explanation:

Note that

`x+9x+3= (1+9)x+3`
`=10x+3`

Answer 2

`10x+3`
It is important that you look at the explanation!

Explanation:

The expression has two groups of numbers. They are: one constant and a set of counts of `x`

We can not mix the constant with the count of x as they are different; in that we do not know the value of `x`. However, we do know the value of 3. So the constant stays as it is and on its own.

Looking at the`" "x` parts:

Adding means 'put with the count'. The opposite of this is subtract; which means 'remove from the count'.

We have one of `x` put with another nine of `x` giving us a total of 10 of `x` written as `10x`.

Putting everything together gives:

`10x+3`