How do you solve $\frac{r}{18} = \frac{3}{27}$ $\frac { r } { 18} = \frac { 3} { 27}$ ?

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Answer 1 · 2017-06-24T01:19:18

$r = 2$ $r=2$

The easiest way is to cross multiply:

$27 r = 54$ $27r=54$

$r = \frac{54}{27}$ $r=54/27$

$r = 2$ $r=2$

Answer 2 · 2017-06-24T01:28:01

One way is to cross-multiply, simplify and then isolate $r$ $r$ . In this case, $r = 2$ $r=2$ .

One way to solve for $r$ $r$ is to cross-multiply and isolate $r$ $r$ .

$\frac{r}{18} = \frac{3}{27}$ $r/18 = 3/27$

To cross multiply...

![Socratic.org]( useruploads.socratic.org )

$27 r = 3 (18)$ $27r = 3(18)$

Now we simplify.

$27 r = 54$ $27r = 54$

And then isolate $r$ $r$ .

$\frac{27 r}{27} = \frac{54}{27}$ $(27r)/27 = 54/27$

$r = 2$ $r = 2$

We can double check our work by subbing in $r = 2$ $r=2$ into the original equation.

$\frac{r}{18} = \frac{3}{27}$ $r/18 = 3/27$

$\frac{2}{18} = \frac{3}{27}$ $(2)/18 = 3/27$

$\frac{1}{9} = \frac{1}{9}$ $1/9=1/9$

Thus, we can conclude that $r = 2$ $r=2$ .

Hope this helps :)

How do you solve r18=327\frac { r } { 18} = \frac { 3} { 27}?