Algebra

Solve the system of linear equations using the substitution method.
3x + 3y = 0
-6x + 9y = -10

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  1. My answer to the above system is (2/3, -2/3). Am I right?

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  2. x + y = 0
    so
    y = - x
    then
    -6 x + 9 (-x) = -10
    - 15 x = -10
    x = 2/3
    then
    y = - x = -2/3
    So Yes

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