Algebra OpenStudy (anonymous):

Given the function f(x) = 2(x + 8), find x if f(x) = 12 2 40 −2 14 OpenStudy (anonymous):

Substitute 12 for x .. hero (hero):

You mean for f(x) OpenStudy (anonymous):

f(x) = (12) + 8) OpenStudy (anonymous):

Well don't do that.... OpenStudy (anonymous):

f(x) = 2(x+8) = 12 hero (hero):

12 = 2(x + 8) OpenStudy (anonymous):

Woops, yeah go with hero's hero (hero):

I'm interested in seeing @Tayloresc solve this OpenStudy (anonymous):

I'm so confused by this hero (hero):

If you have f(x) = 2(x + 8) and they tell you f(x) = 12, then replace f(x) with 12: If you do that you'll have 12 = 2(x+8) Can you solve that for x? OpenStudy (anonymous):

no hero (hero):

Do you know how to add, subtract, multiply and divide? OpenStudy (anonymous):

yes hero (hero):

Well, you can do this. Start with dividing both sides by 2. What do you get afterwards? hero (hero):

You can do this: $\frac{12}{2} = \frac{2(x+8)}{2}$ hero (hero):

Which is the same as $\frac{12}{2} = \frac{2}{2}(x+8)$

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