ISEE Word Problems Question 173: Answer and Explanation

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Question: 173

4. For all pairs of real numbers L and N where L = 2N + 4, N = ?

  • A.
  • B.
  • C. 2L – 4
  • D. -4

Correct Answer: B

Explanation:

The answer is B

First, subtract 4 from both sides: L - 4 = 2N. Next, divide both sides by 2: = N.

Plug in numbers for N and solve for L. If N = 2, then 2(2) + 4 = L = 8. Use 8 for L in each choice to find the answer whose value is 2.

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