SOLUTION: white chocolate cost PHP20 per bar, and dark chocolate cost PHP 25 per bar. if janine bought 15 bars of chocolate for Php340, how many bars of dark chocolate did she buy?

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: white chocolate cost PHP20 per bar, and dark chocolate cost PHP 25 per bar. if janine bought 15 bars of chocolate for Php340, how many bars of dark chocolate did she buy?       Log On


   

Question 1171910: white chocolate cost PHP20 per bar, and dark chocolate cost PHP 25 per bar. if janine bought 15 bars of chocolate for Php340, how many bars of dark chocolate did she buy?
Answer by josgarithmetic(39613) About Me  (Show Source):
You can put this solution on YOUR website!
w of white chocolate
d of dark chocolate
system%28w%2Bd=15%2C20w%2B25d=340%29

4w%2B5d=68
4%2815-d%29%2B5d=68-------------solve this one.