Question

For every 3 laps that Jackie swims Ronnie swims 2 laps during practice they swam a combined total of 70 laps how many laps did Ronnie swim during practice

Answer 1

Jackie swam 42
Ronnie swam 28

Answer 2

Answer:

28 laps

Step-by-step explanation:

Let laps swam by Jackie be J, and laps swam by Ronnie be R.

"For every 3 laps that Jackie swims Ronnie swims 2 laps":

$3R=2J$

"they swam a combined total of 70 laps ":

$J+R=70$

Now, solving for J of the first equation and putting that into the 2nd equation, we can know R:

$3R=2J\\J=\frac{3R}{2}\\and\\J+R=70\\(\frac{3R}{2})+R=70\\\frac{5}{2}R=70\\R=\frac{70}{\frac{5}{2}}=28$

So, Ronnie swam 28 laps.