Question

Solve for x in the proportion

Answer 1

2. add/subtract to get all terms on one side
3. Factor or graph to find value(s) of x

Answer 2

tell me if you have any other questions.

Answer 3

Proportion says that two ratios (or fractions) are equal.

Answer 4

Perhaps a good first step is using this method:

\[\frac{a}{b}=\frac{c}{d}\]Multiply both sides by \(b\). Multiply both sides by \(d\).
\[\frac{a}{b}bd=\frac{c}{d}bd\\\implies\frac{a}{\cancel b}\cancel bd=\frac{c}{\cancel d}b\cancel d\\\implies ad=cb\]

Answer 5

That equation can be rewritten:
x² +x = x + 12
x² -12 =0
It should be a simple matter to solve for 'x' from there.

Answer 6

i got x ≈ −3.14 and x ≈ 4.14

Answer 7

I got something a little different!
Following @wolf1728 's math, add \(12\) to both sides to get \(x^2=12\)

Then \(\sqrt{x^2}=\sqrt{12}\).
that solves to be \(\pm x=\sqrt{12}\) \(\implies x= \sqrt{12}\) or \(x=-\sqrt{12}\).

\(\sqrt{12}\) can be simplified, but there's no reason to do so if you're just going to use a calculator!