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Algebra

posted by on .

solve by elimination:

6a+2b = -48
-6a+b = 57

What is the solution set ( , )?

  • Algebra - ,

    add the equations.

    3b=9
    b=3

    Now for a, by elimination
    multipy the second equation by -2
    12a-2b=-114
    add now the first and this equation, giving
    18a=-162
    b=9

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