Systems of Two Linear Equations in Two Variables

SAT Math· difficulty 3/5

Solve: x2+y3=5\frac{x}{2} + \frac{y}{3} = 5 and x+y=12x + y = 12. What is xx?

  • A

    6

    check_circle
  • B

    8

  • C

    10

  • D

    4

Explanation

Multiply first by 6: 3x+2y=303x + 2y = 30. Sub y=12xy = 12 - x: 3x+242x=303x + 24 - 2x = 30x=6x = 6.

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

Related questions

SAT Math · Systems of Two Linear Equations in Two Variables Practice Question | Acemy