Simplify 7-x-3x ?

2 Answers
Nov 5, 2017

-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.

Nov 5, 2017

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