Question

Solve the following proportion.

Answer 1

\[\frac{ x }{ 2 }=\frac{ 8 }{ x }\]
@hero, do I cross multiply on this one?

Answer 2

multiply both sides by 2x and what do you have?
\(2x\frac{x}{2}=2x\frac{8}{x}\implies\cancel{2}x\frac{x}{\cancel{2}}=2\cancel{x}\frac{8}{\cancel{x}}\implies x^2=16\implies x= \ ?\)

Answer 3

I got x^2 =16, by just cross multiplying. I have no idea how to solve that. Uhhh, 4?

Answer 4

\(x^2=16\implies x=\pm\sqrt{16}=\pm4\)

Answer 5

Yaaaaaay! lol Thank you!

Answer 6

note another way to think about these, and this is how I do, is

move the x to the top on the other side, move the 2 to the top on the other side

we get x^2=16

Answer 7

That's cross multiply, right?