Systems of Two Linear Equations in Two Variables

SAT Math· difficulty 2/5

Solve the system: x+y=10x + y = 10 and xy=4x - y = 4. What is the value of xx?

  • A

    7

    check_circle
  • B

    5

  • C

    3

  • D

    8

Explanation

Adding the two equations: 2x=142x = 14, so x=7x = 7.

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

Related questions