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## anonymous one year ago -6x-y=-25 -3x+4y=19 Solve Eacg System By Elimination Steps Only Please

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1. LynFran

mutiple the 2nd equation throughout by 2 to get .equation 3$-6x+8y=38$..then take away the 1st and 3rd equatio

2. anonymous

you could also multiply the first equation by 4 and then add the 2 equations

3. anonymous

Can Someone Show Me The Steps Because I Got The Answer Already

4. LynFran

$-6x-y=-25$$-(-6x+8y=38)$

5. LynFran

note that the x will cancel leaving $-9y=-63$then we can solve for y by dividing both side of the equation by -9

6. LynFran

so what will y=?

7. anonymous

-72

8. LynFran

$y=\frac{ -63 }{ -9 }$

9. anonymous

Oh So Dont Solve It ?

10. LynFran

|dw:1439776842102:dw|

11. anonymous

-63/-9=7

12. LynFran

correct now since we know that y=7 we can sub y=7 into equation 1 or 2

13. LynFran

to find what is x..

14. anonymous

Can You Show Me ?

15. imqwerty

-6x-y=-25 - 1equation -3x+4y=19 - 2nd equation Double the second nd subtract from first so as to eleminate x -6x-y - 2(-3x+4y)=-25-2(19) -6x-y+6x-8y=-25-38 -9y=-63 y=-63/-9 y=7 Put this valur of y in any of the two equation s nd get the value of x -6x-y=-25 -6x-7=-25 -6x=-25+7 -6x=-18 x=-18/-6 x=3

16. LynFran

using equation 1 |dw:1439777075716:dw|

17. anonymous

Thanks You Both :) You Helped !

18. LynFran

welcome

19. imqwerty

no prblem :) u r welcome

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