CPM Homework Help : CC2MN Problem 8-59

LuAnn talked on her cell phone for $180$ minutes, using $\frac { 3 } { 7 }$ of her total monthly minutes. Find out how many total minutes LuAnn gets to talk in one month using at least two different methods.

Hint:

$180$ minutes is $\frac{3}{7}$ of her total monthly minutes.

Step 1:

$180=\frac{3}{7}x$

Step 2:

$\left(\frac{7}{3}\right)180=\left(\frac{7}{3}\right)\frac{3}{7}x$

Answer:

$x=420$ minutes