Maths-
SAT
Easy

Question

y=(x+3)(x-7)
y=x-7
If (x, y) is a solution to the given system of equations, which of the following could be the value of x?

  1. 2
  2. -3
  3. 3
  4. -2

The correct answer is: -2


    y=(x+3)(x-7)

    y=x-7

    (x+3)(x-7) = (x -7)

    x + 3 = 1

    x = -3 + 1 = -2
    Substitute x = -2 in any equation

    y = (x - 7)

    = - 2 - 7 = -9.

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