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anonymous

  • 4 years ago

does anyone on know how to solve by elimination I posted -9-9x-4y=0 -11x-11-11y=0

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  1. anonymous
    • 4 years ago
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    Set them = to each other

  2. anonymous
    • 4 years ago
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    -9x-4y-9=0 -11x-11-11y=0?

  3. asnaseer
    • 4 years ago
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    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.

  4. campbell_st
    • 4 years ago
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    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

  5. anonymous
    • 4 years ago
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    I don't understand

  6. asnaseer
    • 4 years ago
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    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.

  7. anonymous
    • 4 years ago
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    i was told you either add or subtract from one side

  8. asnaseer
    • 4 years ago
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    you can also multiply or divide both sides by some number

  9. asnaseer
    • 4 years ago
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    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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