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Question 21 of 45

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Mathematics Subtest

Competency 3—Knowledge of algebraic thinking and the coordinate plane

A student argues that  4 left paren x minus 5 right paren minus left paren 6 x plus 1 right paren equals negative 2 x minus 19  Identify the first step that contains an error.

  1. STEP 1, 4 left paren x minus 5 right paren minus left paren 6 x plus 1 right paren equals 4 x minus 20 minus left paren 6 x plus 1 right paren
  2. STEP 2, 4 x minus 20 minus left paren 6 x plus 1 right paren equals 4 x minus 20 minus 6 x plus 1
  3. STEP 3, 4 x minus 20 minus 6 x plus 1 equals 4 x minus 6 x minus 20 plus 1
  4. STEP 4, 4 x minus 6 x minus 20 plus 1 equals negative 2 x minus 19
Choose an answer
Enter to expand or collapse answer.Answer expanded
Correct Response: B.