Question

I really need help on this!

Answer 1

$\frac{2}{x}=\frac{x}{18}$  Cross multiply (multiply 18 on both sides to get rid of the 18 in the denominator, and multiply "x" on both sides to get rid of the x in the denominator

$(18)\frac{2}{x}= \frac{x}{18}(18)$

$\frac{36}{x}=x$

$(x)\frac{36}{x}=x(x)$

36 = x²       Square root both sides to get rid of the ², and to get "x" by itself

√36 = √x²

±6 = x    Your answer is 6

You could have just done this too:

$\frac{2}{x}=\frac{x}{18}$

2(18) = x(x)

36 = x²

√36 = √x²

±6 = x

Answer 2

Answer:

Step-by-step explanation:

$\frac{2}{x} = \frac{x}{18} \\\\ x^2 = 36 \\\ x = \pm 6$

I hope I helped you.