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29 April, 09:45

Solve this linear system. 2.4 = 0.3 x + 0.4y 5x = 2 + 6y A) x = 4; y = 3 B) x = 3; y = 4 C) x = 4; y = - 3 D) x = - 4; y = 3

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  1. 29 April, 10:47
    0
    A) x = 4; y = 3

    Step-by-step explanation:

    2.4 = 0.3x + 0.4y

    5x = 2 + 6y

    0.3x + 0.4y = 2.4

    5x - 6y = 2

    0.4y = 6 y = 6/0.4 = 15

    15 (0.3 + 0.4y) = 15 (2.4)

    4.5x+6y = 36 0.3 (4) + 0.4y = 2.4

    5x - 6y = 2 1.2 + 0.4y = 2.4

    (you add the two equations) 0.4y = 1.2

    9.5x = 38

    x = 4 y = 3
  2. 29 April, 13:05
    0
    A) x = 4; y = 3
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Home » Mathematics » Solve this linear system. 2.4 = 0.3 x + 0.4y 5x = 2 + 6y A) x = 4; y = 3 B) x = 3; y = 4 C) x = 4; y = - 3 D) x = - 4; y = 3
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