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Lines, Angles, and Triangles

SAT Math· difficulty 4/5

Three parallel lines are cut by a transversal. The angles formed at the first two lines are (2x+10)°(2x + 10)° and (3x−5)°(3x - 5)° in corresponding positions. What is xx?

  • A

    20

  • B

    10

  • C

    15

    check_circle
  • D

    5

Explanation

Corresponding angles are equal: 2x+10=3x−52x + 10 = 3x - 5, so x=15x = 15.

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