Question

4/r=5/7solve for r. Help pls

Answer 1

Hello!

You first cross multiply

4 * 7 = 28

5 * r = 5 * r

r * 5 = 28

Divide both sides by 5

r = 28/5 = 5.6

The answer is 28/5 or 5.6

Hope this helps!

Answer 2

Hey there :)

$\frac{4}{r}= \frac{5}{7}$

We can solve by cross multiplication
4 × 7 = 5 × r
28 = 5r

Divide by 5 on either side to isolate r and find its value
$\frac{28}{5} = \frac{5r}{5}$

r = 5.6