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Systems of Two Linear Equations in Two Variables

SAT Math· difficulty 3/5

For what value of aa are the lines ax−3y=6ax - 3y = 6 and 4x−6y=124x - 6y = 12 the same line?

  • A

    3

  • B

    4

  • C

    2

    check_circle
  • D

    1

Explanation

Multiply eq1 by 2: 2ax−6y=122ax - 6y = 12. Match: 2a=42a = 4 → a=2a = 2.

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