Question 25724
Let x = number of minutes on aerobics.
y = number of minutes on weight training


You need two equations:
x+y = 250

Then, set up a ratio {{{ (aerobics)/(weight training) =3/2=x/y}}}, from which you  get:
2x = 3y


x+y = 250
2x - 3y = 0


Multiply the first equation by 3:

3x + 3y = 750
2x - 3y = 0
5x = 750
x= 150 hours aerobics
y = 100 hours weight training


R^2 at SCC