You can
put this solution on YOUR website! f(x)=x+7 what is f(-15)=
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I will assume you made a typo and failed to hold down the shift key,
and typed an = instead of a +.
Start with
f(x) = x + 7
And everywhere you see x, instead of x write -15 instead of x
and you have
f(-15) = -15 + 7
then you simplify the right side:
f(-15) = -8
and you are done.
[Note that f(x) does NOT mean fx nor does f(-15) mean -15f. You leave
f(-15) just as it is and the final answer is f(-15) = -8]
Edwin
