Question

Nerds are you bored? Here's a question for you:
Find the value of x so that the function has the given value:
f(x)=6x+9;3.
When you figure this out show me step by step how to do this:)
I respect Nerds:)

Answer 1

function = f(x) = 6x + 9

Answer 2

you need to find value of x, which makes the function become 3 ha ?

Answer 3

ok

Answer 4

is 3 you x if so then... f(x)=27

Answer 5

f(x)=6x+9

3=6x+9

keep going to solve for x

Answer 6

Do you think you could explain more.....

Answer 7

you replace f(x) with 3, then solve for x

This is because you want to find an x value that will give you f(x) = 3

It's going backwards from the last problem (where you plug in some given number to get another number)

Answer 8

Do you know how to solve for x?

Answer 9

Not really, I do but I always mess up

Answer 10

you want to isolate x, so you want x all by itself

Answer 11

to do that, you follow PEMDAS in reverse by undoing operations

eg: you undo +9 by subtracting 9 from both sides in your first step

3=6x+9

3-9=6x+9-9

-6 = 6x

What's next?

Answer 12

you divide -6 into 6

Answer 13

yes good

Answer 14

giving you x = ???

Answer 15

1

Answer 16

close

Answer 17

-1

Answer 18

good, x = -1

Answer 19

notice this

when x = -1, f(x) is...

f(x)=6x+9

f(-1)=6(-1)+9

f(-1)=-6+9

f(-1)=3

and that's exactly the output we were given

Answer 20

thanks

Answer 21

yw