SOLUTION: What is the value of g(x) - f(x) if:
f(x) = 2x + 4
g(x) = 3x - 2
x = 12?
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Question 423357: What is the value of g(x) - f(x) if:
f(x) = 2x + 4
g(x) = 3x - 2
x = 12?
Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
g(x) = 3x - 2
f(x) = 2x + 4
x = 12
g-f(x) = g(x) - f(x) = (3x-2) - (2x+4)
this becomes 3x - 2 - 2x - 4 which becomes x - 6
when x = 12, this becomes 12 - 6 = 6
an alternative way to solve this is to solve for x = 12 first and then do the f(x) - g(x) thing.
example:
your original problem:
g(x) = 3x - 2
f(x) = 2x + 4
x = 12
replace x with 12 in f(x) and g(x) to get:
g(12) = 3*12 - 2 = 36 - 2 = 34
f(x) = 2*12 + 4 = 24 + 4 = 28
g(12) - f(12) = 34 - 28 = 6
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