How do you solve 3/x=7/10?

2 Answers
Jul 8, 2016

$x = \frac{30}{7}$

Explanation:

Cross multiply.

$\frac{3}{x} = \frac{7}{10}$

$3 \times 10 = 7 \times x$

$30 = 7 x$

$x = \frac{7}{30}$

Jul 8, 2016

$x = \frac{30}{7}$

Explanation:

The first step we need to take to solve the problem is get rid of the fractions in this case we can simply cross multiply:

$\frac{3}{x} = \frac{7}{10}$

So multiply the left numerator by the right denominator, then the left denominator by the right numerator.

$30 = 7 x$

Simply solve like a standard linear equation:

$7 x = 30$
$x = \frac{30}{7}$