Solve for : .

Answer and explanation

Correct answer: C.

  1. Step 1: Expand both sides: .
  2. Step 2: Rearrange variables and constants: .
  3. Step 3: Divide by 4: .
Answer
.
Why not the others: '' subtracts 19 from 15 instead of adding; '' miscalculates as 36; '' divides 30 by 4.

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