For the function f(x) = 3x+2, find x such that f(x) = 14.
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OpenStudy (anonymous):
Alright, let's do this! Love your name btw
OpenStudy (anonymous):
well so 14 = 3x + 2
OpenStudy (anonymous):
thanks!
OpenStudy (anonymous):
Ok so let's evaluate f(x) at 14
This is f(14)
So we plug in 14 for the x in the function and evaluate!
Like so... f(14) = 3(14)+2
OpenStudy (anonymous):
ok
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OpenStudy (anonymous):
Do you know what to do now?
OpenStudy (anonymous):
i get what you are saying @Cosmichaotic and ya i do let me do the work and ill ask if the answer is right
OpenStudy (haseeb96):
f(x)=3x+2
and f(x)=14
u have found one thing common in both the equation that is the left hand term is same so put the 14 there
then it become
14=3x+2
3x+2-14=0
3x-12=0
3x=12
x=12/3
x=4 is the correct answer
OpenStudy (anonymous):
@Haseeb96 is right ;)
OpenStudy (anonymous):
Oh, where f(x) = 14, not for x = 14, my bad.
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OpenStudy (anonymous):
i got 44
OpenStudy (anonymous):
no @Shadowgirl15 forget that...
OpenStudy (haseeb96):
No @PFEH.1999 is correct my brother @Cosmichaotic
OpenStudy (anonymous):
so the answer is 4?
OpenStudy (haseeb96):
@Shadowgirl15 please have serve of my explanation
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OpenStudy (anonymous):
We are actually setting f(x) to 14 here, and not x to 14
So we need to say
f(x) = 14
f(x) = 3x+2
So 14 = 3x + 2
and then solve for x.