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22 May, 17:34

Solve the system of equations using the substitution method.

{4x+5y=7

{y=3x+9

Enter your answers in the boxes.

x=

y=

+4
Answers (1)
  1. 22 May, 21:06
    0
    4x+5y=7

    y=3x+9

    1) 4x+5 (3x+9) = 7 2) y=3 (-2) + 9

    y = - 6 + 9

    4x+15x+45=7 y=3

    19x+45=7

    19x = - 38

    x = - 2

    x is - 2 and y is 3
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