Question

Let f(x)=-5x+8. For what value of x does function f have the given value? f(x)=-7

Answer 1

So if f(x)=-7, what is the equation -5x+8 equal to?

Answer 2

-7?

Answer 3

correct. So we have the equation -7=-5x+8. So now what do you think we should do? Maybe put like terms together?

Answer 4

yes

Answer 5

so would it look something like this 0=-5x+15?

Answer 6

sorry meant -15=-5x, then divide by -5 to get a positive 3

Answer 7

Yes that is absolutely correct. Sorry for the delayed reply.

Answer 8

it's alright, thanks for your help :)