Question

Solve these proportions.
3/x = x/4
x =

Answer 1

x=???

Answer 2

Cross-multiply.
\[\frac{ 3 }{ x } = \frac{ x }{4 }\]
(3)*(4)=x*x
12=x2
and subtract \(x^{2} \) from both sides 12−\(x^{2} \)=\(x^{2} \)−\(x^{2} \)
−\(x^{2} \)+12=0

Answer 3

subtract 12 from both sides
−x^{2}+12−12=0−12
−x^{2}=−12
Than divide both sides by -1
\[\frac{ −x^{2} }{ -1 } = \frac{ -12 }{ -1 }\]
\[\ x^{2}=12\]

Answer 4

Ughh at last take the square root
\(x=+2\sqrt{3}\) \(\ x=-2 \sqrt{3}\)

Or \[x= \pm2\sqrt{3}\]

Answer 5

thank you sooo much!!!

Answer 6

Oh lol my pleasure, i hope that helps. cx