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20 November, 02:27

What is the solution?

y=-x+21

y=-2x+30

a. (8,12)

b. (9,11)

c. (8,11)

d. (9,12)

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Answers (1)
  1. 20 November, 02:32
    0
    -x + 21 = - 2x + 30

    -x + 2x = 30 - 21

    x = 9

    y = - 2x + 30

    y = - 2 (9) + 30

    y = - 18 + 30

    y = 12

    solution is (9,12)
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