SOLUTION: May I please have assistance on how to calculate this? Mary needed different colored balloons for decoration. She had $1.25 and spent it all on a number of white, red, and blue b

Question 828411: May I please have assistance on how to calculate this?
Mary needed different colored balloons for decoration. She had $1.25 and
spent it all on a number of white, red, and blue balloons. A white balloon costs
$.10, a red one $.15 and a blue one $.05. She bought one white balloon less
than the red and the total number of white and red balloons equals the number
of blue ones. How many of each color did Mary buy?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Mary needed different colored balloons for decoration. She had $1.25 and
spent it all on a number of white, red, and blue balloons.
A white balloon costs $.10, a red one $.15 and a blue one $.05.
She bought one white balloon less than the red
and the total number of white and red balloons equals the number
of blue ones.
How many of each color did Mary buy?
-------
Equations:
Value Eq:: 10w + 15r + 5b = 125 cents
Quantity:: w - r + 0 = -1
Quantity:: w + r - b = 0
======================================
I used a matrix function on my calculator to get:
w = 3 (# of white)
r = 4 (# of red)
b = 7 (# of blue)
=======================
Cheers,
Stan H.
RELATED QUESTIONS
I have worked different variations for my online homework and am still stuck on this... (answered by richard1234)

Please help to solve Amanda had 75 balloons and Dolly had 45 balloons . After each of... (answered by lynnlo)

Mary purchased a package of 18 different plants, but she only needed 15 plants for... (answered by Alan3354)

Use the 5 steps for problem solving to work this problem... Copy Cats charges a $21... (answered by fcabanski)

Factor: 16x^4 � 2xy^3 It has been a while since I had Algebra, Trig, etc. 1. How... (answered by rapaljer)

Hi, I was given a question that I need help in completing. The unit I have been... (answered by Fombitz)

Hi, I know this may be a very simple question for you but I need assistance. Here is... (answered by Fombitz)

Mary had 20 coins. When she counted them she found she had the same value as if she had... (answered by Edwin McCravy)

Hello I am helping my son on a homework assignment. Unfortunately am stuck on this... (answered by Earlsdon)