Question 145377
{{{30/x = 8/15}}}
First multiply both sides by {{{x}}}
{{{x*(30/x) = x*(8/15)}}}
On the left side, the {{{x}}}s cancel
{{{30 = x*(8/15)}}}
Now multiply both sides by {{{15}}}
{{{15*30 = 15x*(8/15)}}}
The {{{15}}}s on the right side cancel
{{{450 = 8x}}}
Divide both sides by {{{8}}}
{{{x = 225/4}}}
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Now to check
{{{30/x = 8/15}}}
{{{30/(225/4) = 8/15}}}
Multiply both sides by {{{225/4}}}
{{{30 = (225/4)*(8/15)}}}
Now divide {{{225}}} by {{{15}}}
{{{30 = (15/4)*8}}}
Divide {{{8}}} by {{{4}}}
{{{30 = 15*2}}}
{{{30 = 30}}}
OK