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Answer 1 · 2017-03-31T04:40:58

Translated $15 - ( n +5)$ Simplified $10 - n$

decreased translates as a subtraction problems.

sum of a number and five means to add

As 15 is decreased by both the number and five this must be written as a binomial in brackets. hence

$15- ( n + 5)$ To simplify remove the parentheses by distributing the negative sign This equals

$15 - n - 5$ Now group like terms giving

$15 - 5 -n$ This gives

$10 - n$