How do you simplify $-55n + 28n + 21n + 7n - n$ ?

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Answer 1 · 2016-09-05T21:11:49

$0$

These are all like terms. Simplify into one term, taking the positive and negative terms into consideration.

$-55n + 28n + 21n + 7n - n$

= $color(blue)(28n + 21n + 7n)color(red)( -55n - n)$

= $color(blue)(56n)color(red)( -56n)$

= $0$

How do you simplify -55n + 28n + 21n + 7n - n-55n + 28n + 21n + 7n - n?