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16 July, 05:09

Suppose 3x + 4y = 52 and 5x + y = 30. What is the value of 8x - 2y?

es)

A6

B)

8

Submit

+5
Answers (1)
  1. 16 July, 05:24
    0
    5x+y=30

    y=30-5x

    3x+4 (30-5x) = 52

    3x+120-20x=52

    -17x+120=52

    -17x=-68

    x=4

    5 (4) + y=30

    20+y=30

    y=10

    8 (4) - 2 (10)

    32-20

    12

    So the value of 8x-2y is 12 where x=4 and y=10
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