Question

Simplify `7-x-3x` ?

Answer 1

`-4x + 7`

Explanation:

To simplify this problem, we first have to combine like terms.
`-x` and `-3x` are like terms, so when we combine them we get `-4x`.
There are no more like terms, so unless if we know what x is,
`7 - x - 3x` can be simplified to `7 - 4x`.
In math, when we have answers like this it's best to put numbers with exponents or coefficients before constants, so the final answer should be `-4x + 7`.

Answer 2

Expression `=7-4x`
[Assuming `X` and `x` represent the same variable]

Explanation:

Assuming `X` and `x` represent the same variable

Expression `= 7-x-3x`

`= 7-(1+3)x = 7-4x`