Question

Solve for x in the proportion:

Answer 1

\[\frac{ 3x }{ 3x - 36 }\] = \[\frac{ -1 }{ x }\]

Answer 2

Did you cross multiply?

Answer 3

Also it would make your life easier if you would divide numerator and denominator of the first fraction by 3 before you cross multiply.

Answer 4

\[\frac{ x }{ x - 12 }\] ? @Mertsj

Answer 5

Yes. So you you have:

Answer 6

\[\frac{x}{x-12}=\frac{-1}{x}\]

Answer 7

Cross multiply and solve.

Answer 8

Alrighty, one second.

Answer 9

x^2 = -x + 12 ?

Answer 10

Now add x to both sides and subtract 12 from both sides so that the right side will be 0

Answer 11

12 = x^2 + x

Answer 12

0 = x^2 + x - 12 how do I solve?

Answer 13

factor x^2+x-12

Answer 14

Oh wow, thanks (:

Answer 15

What did you get for your answers?

Answer 16

x = -3 and x = 4

Answer 17

I was afraid of that.