Math Question

Discussion in 'Green Room' started by Bman, Mar 7, 2003.

1. BmanOSNN Veteran Original

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How would you solve this?

Solve each linear system.

a) x + y = -8
x - 2y = 7

2. BmanOSNN Veteran Original

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anybody??????.......

3. HeeterOverclocked Like A Mother

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Can You tell that it's been 17 years since I last left school.

Heeter

4. KruxNissan Powered

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why type of math is this? and are u trying to find what x= or what?

5. GeffyModeratorFolding Team

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if both of those are in the same part of the question ie both as a) then I would say that you do it by simultaneous equations

x + y = -8 --> leave
x - 2y = 7 --> multiply by -1

x + y = -8
-x + 2y = -7

3y = -15 --> y = -5

x + -5 = 8 --> x = -3
x - 2(-5) = 7 --> x = -3

x = -3
y = -5

both equations work, so yeah I think this is the right way to do it

6. GeffyModeratorFolding Team

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Since you last left school?? Why did you go back?

7. dave holbonModerator

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This is not a linear system/equation.

8. Evil MargeI RulePolitical User

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18 year for me.....That's a long long time ago

9. the_music_manaka prodj88 =P

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to get that answer you use system of equations. which means multiplying by a certain number to get something in common so they cancel out!

10. Friend of BillWhat, me worry?

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I always left math problems to the math teacher...

11. GeffyModeratorFolding Team

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look at my post above, thats what I did

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cool

13. dave holbonModerator

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So + two apples and a banana still equals an orange –two apples and a banana then?