Systems of Two Linear Equations in Two Variables

SAT Math· difficulty 4/5

The system 4x+6y=84x + 6y = 8 and 6x+9y=c6x + 9y = c has infinitely many solutions for what value of cc?

  • A

    16

  • B

    10

  • C

    12

    check_circle
  • D

    15

Explanation

Multiplying first by 1.51.5: 6x+9y=126x + 9y = 12. So c=12c = 12.

Want 10 more like this — adaptive to your weak spots?

Related questions