Systems of Two Linear Equations in Two Variables

SAT Math· difficulty 2/5

What is the xx-coordinate of the intersection of y=2x+1y = 2x + 1 and y=x+7y = -x + 7?

  • A

    1

  • B

    3

  • C

    2

    check_circle
  • D

    4

Explanation

2x+1=x+72x + 1 = -x + 73x=63x = 6x=2x = 2.

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