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26 April, 10:43

Solve the following system of linear equations using substitution or elemination:

2x=4y+6

7+x=-3y

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Answers (1)
  1. 26 April, 14:15
    0
    2x = 4y + 6

    7 + x = - 3y

    Solve for 'x' in the first equation.

    2x = 4y + 6

    x = 2y + 3

    Substitute the first equation into the second equation.

    x = 2y + 3

    7 + x = - 3y

    7 + 2y + 3 = - 3y

    2y + 10 = - 3y

    5y + 10 = 0

    5y = - 10

    y = - 2

    Plug y = - 2, and solve for x

    7 + x = - 3 (-2)

    7 + x = 6

    x = - 1

    The solution to the system of linear equations is (-1,-2).
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