anonymous
  • anonymous
does anyone on know how to solve by elimination I posted -9-9x-4y=0 -11x-11-11y=0
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
Set them = to each other
anonymous
  • anonymous
-9x-4y-9=0 -11x-11-11y=0?
asnaseer
  • asnaseer
divide the 2nd equation by 11 to get: -x -1 -y = 0 then get an expression for x from this by adding x to both side: -x -1 -y + x = 0 + x -1 -y = x now substitute this expression for x into the first equation and solve.

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campbell_st
  • campbell_st
rewite the equations as 11y = -11x -11 then y = (-x -1) sub into the 1st equation -9x -4(-x -1) = 9 then solve for x so I think x = -1 and y = 0
anonymous
  • anonymous
I don't understand
asnaseer
  • asnaseer
you are given two equations with two unknowns in each equation (x and y). the idea is to eliminate one of the unknowns and then solving the resulting equation with just one unknown.
anonymous
  • anonymous
i was told you either add or subtract from one side
asnaseer
  • asnaseer
you can also multiply or divide both sides by some number
asnaseer
  • asnaseer
your 2nd equation had a common factor of 11 in every term - so if you divide by 11, you get a much simpler equation

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