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21 July, 13:17

Y + 2.3 = 0.45x

-2y = 4.2x - 7.8

(2.4, - 1.2)

(-1, 2.5)

no solution

infinitely many solutions

+1
Answers (1)
  1. 21 July, 16:55
    0
    Multiply the first equation by 2:-

    2y + 4.6 = 0.90x

    2y - 0.90x = - 4.6

    second equation is

    -2y - 4.2x = - 7.8

    Adding:-

    -5.1x = - 12.4

    x = 2.4

    -2y = - 7.8 + 4.2 (2.4) = 2.3

    x = - 1.2

    Answer x = 2.4 and y = - 1.2

    Its choice A
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