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10 April, 16:16

X=2y+7

x=y+4

with substitution

+1
Answers (1)
  1. 10 April, 17:19
    0
    x = 2y + 7 (*)

    x = y + 4 (**)

    Substitute (*) to (**):

    2y + 7 = y + 4 subtract 7 from both sides

    2y = y - 3 subtract y from both sides

    y = - 3

    Put the value of y to the second equation:

    x = - 3 + 4

    x = 1

    Answer: x = 1 and y = - 3 → (1, 3)
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