Posted by logan on Wednesday, October 22, 2008 at 5:35pm.
trish sends letters ans postcard to her friends.She needs 37 cents in postage for each letter and 21 cents for each postcard. She spends$3.11 in postage. How many letters and postcards did trisha send in all?

math  Reiny, Wednesday, October 22, 2008 at 5:56pm
you want whole number solutions, ordered pairs, for the equation
37L + 21P = 311
This is an example of a Diophantine's equation.
Somehow I don't think you are studying that topic
by just doing simple trial and error, I got
L = 5, and P=6
check: 5x37 + 6x21 = 311
Answer This Question
Related Questions
 Math  During summer vacation, Sanjay writes letters and postcards to his ...
 algebra  how to solve this question? to print 6000 post cards suppose it costs...
 Math  Gary mailed a box that weighed 2 pounds 8 ounces. The postage cost $15.60...
 Math (hard)  Postcard stamps are 20 cents each, while letter stamps are 33 ...
 math help plz...  The function c=23(n1)+37 represents the cost c in cents for ...
 Math  Diane has one stamp of each positive integer value 1 cent through 9 cents...
 Algebra  Diane has one stamp of each positive integer value 1 cent through 9 ...
 2nd grade Math  Wich 3 flowers add up to 85 cents? Tulip48 cents Rose52 cents...
 math  Paul has two thirds as many postcards and shawn the number of postcards ...
 History  Even though I asked this before, can you please help me with this and ...
More Related Questions