SOLUTION: Given f(x) = -X - 5 find f(a - 1) how would you work this problem when X is substituted with another letter rather then a number?

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Question 146615: Given f(x) = -X - 5 find f(a - 1)
how would you work this problem when X is substituted with another letter rather then a number?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x%29+=+-x-5 Start with the given function


f%28a+-+1%29=+-%28a+-+1%29-5 Replace each x with a+-+1


f%28a+-+1%29=+-a+%2B+1-5 Distribute


f%28a+-+1%29=+-a+-4 Combine like terms