Simplify #7-x-3x# ?

2 Answers
Nov 5, 2017

Answer:

#-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

Answer:

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#