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21 December, 08:28

Which is a solution to the system of equations?

x + 3y = 18

x + 2y = 14

A) (6, 4)

B) (4, 6)

C) (6, - 4)

D) (-4, 6)

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Answers (1)
  1. 21 December, 08:46
    0
    A.

    Eqn 1 - Eqn 2:

    x + 3y - (x + 2y) = 18 - 14

    x + 3y - x - 2y = 4

    y = 4

    Substitute y = 4 into Eqn 1 (You can also do this with Eqn 2 instead)

    x + 3 (4) = 18

    x = 6

    Thus, (6,4)
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