How do I evaluate the function f(x)=-4x+7 when f(x)=-13?

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Answer 1 · 2018-07-19T23:08:49

#x=5#

If #f(x)# is equal to two things, we can set those things equal:

#-4x+7=-13#

Notice, all this equation is saying is #f(x)=f(x)#.

We can subtract #7# from both sides to get

#-4x=-20#

Lastly, divide both sides by #-4# to get

#x=5#

Hope this helps!