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4 March, 12:23

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to y from the second equation is substituted into the first equation.

2x - 7y = 4

3x + y = - 17

A) 2 (3x - 17) - 7y = 4

B) 2 (-3x - 17) - 7y = 4

C) 2x - 7 (3x - 17) = 4

D) 2x - 7 (-3x - 17) = 4

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Answers (1)
  1. 4 March, 12:28
    0
    option D

    2x - 7 (-3x - 17) = 4

    Step-by-step explanation:

    Given in the question two equations

    Equation 1

    2x - 7y = 4

    Equation 2

    3x + y = - 17

    Rearranging equation 2 in terms of y

    3x + y = - 17

    y = - 17 - 3x

    Put this value of y in Equation 1

    2x - 7y = 4

    2x - 7 (-17 - 3x) = 4

    So,

    If you use the substitution method to solve the following system, new equation will be

    2x - 7 ( - 3x - 17) = 4
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