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Systems of Two Linear Equations in Two Variables

SAT Math· difficulty 2/5

Solve: x+y=8x + y = 8 and 2x−y=12x - y = 1. What is xx?

  • A

    4

  • B

    5

  • C

    2

  • D

    3

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Explanation

Adding: 3x=93x = 9, x=3x = 3.

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