math
posted by norman .
can anyone help with this?
suppose you bought some 32 cents stamps and some 20 cents stamps. you spent $3.92 for 16 stamps. how many of each stamp did you buy?
i got the equation.32x + .20y = $3.92 but don't know how to solve for x and y
Step 1: Solve for y in equation (1).
.20y = 3.92  .32x
Step 2: Substitute this value for y in equation (2). This will change equation (2) to an equation with just one variable, x.
.32x + .20(3.92  .32x)= 3.92
multiply it out
.32x + (.20 x 3.92)  (.20 x .32x) = 3.92
solve for x, then go back and plug x into the equation and solve for y
yes now i understand the process. i just couldn't get past seeing x and y. thanks
i get
.32x + .784 .064x = 3.92
.256x + .784 = 3.92
.256x = 3.136
x=12.25?????
Hello Norman, in case u have not solved this yet, try this:
x+y = 16
32x + 20y = 392
You will get whole number answers for x and y.

If you do try hack revise your answer works if you do .32x6 is 1.92 and add .20x10 is 200 and add 1.92 and 2.00 you get 3.92
Respond to this Question
Similar Questions

math
suppose you bought some 32 cent stamps and some 20 cent stamps. you spent $3.92 for 16 stamps. how many of each stamp did you buy? 
math
still can't solve .32x + .20y = 3.92 it's my last math question for the day!!!! What do you mean solve it? 
math
suppose you bought some 32 cents stamps and some 20 cents stamps. you spent $3.92 for 16 stamps. how many of each stamp did you buy? 
intermediate algebra
A business executive bought 40 stamps for $13.68. The purchase included 37 cents stamps and 23 cents stamps. How many of each type of stamp were bought? 
Math (Please Help)
A man went to a post office to buy stamps. He bought x, 50 cent stamps and y, 25 cent stamps for $3.50. If he bought twice as many 50 cent stamps and half as many 25 cent stamps, the cost would be $4.75. Evaluate x and y 
maths.
Alice spent some money on 60 stamps of two different values. The values of stamps could be 5cents, 10cents,20cents and 30cents. The total amount of money he spent was between $5 and $10. 2/5 of the tamps cost 4/3 times as much … 
Algebra
Word Problems (Addition/Elimination Method). Check if my answers are correct. 1.A girl bought 2 CDs and 3 DVDs for $92. Each DVD costs $4 more than the CDs. What is the price of each CD and DVD? 
Math
A woman bought some 13 cent stamps and some 8 cent stamps at the posg office. She spent exactly 1 dollar. How many of each stamp could she have bought? 
Algebra
Luanne bought 50 stamps, some costing 37 cents and the rest costing 22 cents. She paid the postal clerk a total of $13.25 for all the stamps. How many of each type of stamp did Luanne buy? 
Algebra
Amy bought 18 stamps. Some were for postcards and cost 35 cents. The others were for regular mail and cost 49 cents. She spent $7.28 on the stamps. How many of each did she buy?