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10 June, 19:36

Use the elimination method to solve the system of equations. Choose the

correct ordered pair.

7x+3y = 30

-2x+3y = 3

ОА. (3, 5)

ОВ. (3, 3)

Ос. (6, 5)

D. (6, 3)

+5
Answers (1)
  1. 10 June, 20:19
    0
    B (3,3) is the answer

    Explanation:

    7x+3y=30

    -2+3y=3

    Choose a variable to eliminate (We'll choose Y)

    (7x+3y=30) - > 7x+3y=30

    (-2x+3y=3) - 1 - > 2x+-3y=-3

    The - 3y camels the other 3y, combine the equations

    9x=27

    Divide both sides by 9

    9x/9 = 27/9

    x = 3

    Back to 7x+3y = 30

    Substitute the x with 3

    7 (3) + 3y = 30

    21+3y = 30

    Move the constant to the other side

    21+3y=30

    -21 - 21

    3y=9

    Divide both sides by 3

    3y/3 = 9/3

    y = 3
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