Question

If f(x) = x + 2, find the value of x if f(x) = 12.

Answer 1

oh ok so all you do is fill in 12 for x
do you get it?

Answer 2

lizzyend515, that would be true if it said "x = 12"

but it's saying "f(x) = 12"

Answer 3

f(x) = x + 2

12 = x + 2 ... replace f(x) with 12 (since f(x) = 12)

now solve for x

Answer 4

then add 2

Answer 5

you have +2 on the right side

you have to undo it to isolate x

what undoes +2?

Answer 6

-

Answer 7

yes, subtract 2 from both sides

Answer 8

10

Answer 9

good, x = 10

Answer 10

thank you

Answer 11

you're welcome