SOLUTION: Translate the problem into a pair of linear equations in two variables. A sum of money amounting to $3.80 consist of dimes and quarters. If there are 2o coins in all, how many

Algebra ->  Linear-equations -> SOLUTION: Translate the problem into a pair of linear equations in two variables. A sum of money amounting to $3.80 consist of dimes and quarters. If there are 2o coins in all, how many       Log On


   

Question 234396: Translate the problem into a pair of linear equations in two variables.
A sum of money amounting to $3.80 consist of dimes and quarters. If there are 2o coins in all, how many quarters?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
"$3.80 consist of dimes and quarters" ___ 10d + 25q = 380

"20 coins in all" ___ d + q = 20 ___ d = 20 - q

to find q, substitute for d