algebra 2

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to x from the first equation is substituted into the second equation.

x + y = 2
3x + 2y = 9

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  1. x + y = 2 Multiply both sides by 2

    2 x + 2 y = 4

    2 y = 4 - 2 x

    3 x + 2 y = 9

    3 x + 4 - 2 x = 9

    x + 4 = 9

    x = 9 - 4 = 5

    x + y = 2

    5 + y = 2

    y = 2 - 5 = - 3

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