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Tutors Answer Your Questions about Expressions-with-variables (FREE)
Question 111383: 2x-3y-z=0
x+y+z=3
4x-5y-z=2
I would like to know how to do this either by elimination or substitution i have it for a homework and i have to turn it in tomorrow and i dont know how to do it i will appreciate your help
Thanks
Click here to see answer by scott8148(3382)   |
Question 111983: Hi I am trying to figure out how to solve this equation:
3x = 6y = 0
x = 2/3
I can either solve it by substitution or additon.
What I think should be done is to first substitute the x=2/3 into the first problem.
So, now I have 3 and 2/3 = 6y= 0
then I can make the 3 and 2/3 into an improper fraction so I now have
11/3 + 6=0
If I subtract the 11/3 from both sides I then have
6y= -11/3
The 11/3 is also a fraction 3.6 and repeating.
If I divide by 6 to isolate the y I then have
y= -0.6
Is there a better way to approach this problem so I don't get stuck with a negative decimal as I will still have to go back in and replace the y with the
-0.6
If I do the problem like I showed then I come up with x = - 1.2
Click here to see answer by stanbon(26259)  |
Question 111989: Hi I am trying to set up a problem involving the production of bouquets and wreaths. Bouquets take 1 hour and wreaths take 2 hours. Labor is limited to 80 hours per week and production capacity is limited to 60 items per week.
I know my first step is to write the two equations.
I am not certain if I write it like this as I also have to write a system of inequalities representing this situation, where x is the number of bouquets and y is the number of wreaths and graph.
Let X = bouquets
Let y = wreaths
1x + 2y = 80 or would I use 60?
Then I have the other equation to write and I am not certain how to accomplish that.
This is a confusing problem and I would really like to know how to write the two equations correctly.
Thank you very much for your help.
Tracy
Click here to see answer by ankor@dixie-net.com(6691)  |
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