[tex]\frac{2}{x}=\frac{x}{18}[/tex] 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
[tex](18)\frac{2}{x}= \frac{x}{18}(18)[/tex]
[tex]\frac{36}{x}=x[/tex]
[tex](x)\frac{36}{x}=x(x)[/tex]
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:
[tex]\frac{2}{x}=\frac{x}{18}[/tex]
2(18) = x(x)
36 = x²
√36 = √x²
±6 = x
