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The problem in the image asks for the value of \( x \) in a sequence where each number is obtained by summing the two consecutive numbers in the row above it.

Here’s the sequence provided:

\[
\begin{array}{ccccc}
4 & & 15 & & 27 \\
& 19 & & x & \\
& & 139 & & \\
\end{array}
\]

We know that:
- \( 19 = 4 + 15 \)
- \( x = 15 + 27 \)
- \( 139 = 19 + x \)

Let’s solve for \( x \):

1. From the second row, \( x = 15 + 27 = 42 \).
2. To verify, substitute \( x = 42 \) in the third row:
   \[
   139 = 19 + 42 = 61 \text{ (which is incorrect, indicating a mistake in initial assumptions).}
   \]

Since \( 139 \) should be the sum of \( 19 \) and \( x \), the correct \( x \) should satisfy:
\[
x = 139 - 19 = 120.
\]

Thus, the correct value of \( x \) is \( 120 \).

Do you want more details or have any questions? 

Here are 5 relative questions:
1. How can you verify the sequence after determining \( x \)?
2. What would the next step be in the sequence below \( 139 \)?
3. How would the problem change if the numbers in the sequence followed a different rule?
4. Can you generalize this problem to a sequence with more terms?
5. What other mathematical sequences follow a similar pattern?

**Tip:** When solving sequences, double-check by working both forwards and backwards to ensure consistency with all given values.

In the following sequence, each number is obtained by summing two consecutive numbers from the row above. What is the value of x?

Learn how to find the missing value of x in a number pyramid where each number is obtained by summing consecutive numbers from the row above. This problem covers key algebraic concepts and arithmetic sequences.

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