How do you simplify $(2n + 5) - (3n + 7) + (4n - 9)$ ?

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Answer 1 · 2015-06-13T12:41:13

$=color(blue)( 3n -11$

$2n + 5 - 3n - 7 + 4n - 9$

Grouping like terms
$color(red)(2n - 3n + 4n) +color(blue)( 5 - 7 - 9)$

$=color(blue)( 3n -11$

How do you simplify (2n + 5) - (3n + 7) + (4n - 9)(2n + 5) - (3n + 7) + (4n - 9)?