Systems of Two Linear Equations in Two Variables

SAT Math· difficulty 3/5

The system 2x+3y=72x + 3y = 7 and kx+6y=14kx + 6y = 14 has infinitely many solutions when k=?k = ?

  • A

    2

  • B

    3

  • C

    5

  • D

    4

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Explanation

Multiply eq1 by 2: 4x+6y=144x + 6y = 14. Match: k=4k = 4.

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