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4 July, 16:46

Given the system of equations, what is the y-coordinate of the solution?

5x - 4y = 7

x = 5 - y

a) 36/7

b) 36/23

c) 18/23

+5
Answers (1)
  1. 4 July, 16:59
    0
    Subsitute 5-y for x in other equation

    5 (5-y) - 4y=7

    25-5y-4y=7

    25-9y=7

    minus 25 both sides

    -9y=-18

    divide both sides by - 8

    y=2

    not listed

    so I would say D
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