If and , what is the value of ?

Answer and explanation

Correct answer: A. 14

- 21 multiplies instead of .
- 10 results from evaluating .
- 9 is the sum .
  1. Step 1: Add the equations to isolate : .
  2. Step 2: Find from : .
  3. Step 3: Multiply the two solutions: .
Answer
14.

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