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    Use Substitution and Elimination to Solve the Linear Equation.

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    Please solve the following system of equations using both of these methods (solve once using substitution and once using elimination):

    -4x+9y=-71; 3x-y=13 and -2x+3y=9; -4x+6y=18

    Also, can you show you work so I can understand. Thank you.

    © BrainMass Inc. brainmass.com October 10, 2019, 4:58 am ad1c9bdddf
    https://brainmass.com/math/linear-algebra/substitution-elimination-solve-linear-equation-486014

    Solution Preview

    Methods of substitution:
    -4x+9y=-71 (I)
    3x-y=13 (II)

    From (II), y=3x-13 (III), plug into (I):
    -4x+9(3x-13)=-71.
    x=2.
    Plug x=2 into (III):
    y=3*2-13=-7.
    Therefore, the solution ...

    Solution Summary

    The solution provides detailed explanation how to use substitution and elimination to solve linear equations.

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