What value will come in place of the question mark (?) in each of the following questions ?
`592.5-156.7=278.4+?`

Options

A. 152.4
B. 157.4
C. 167.4
D. 168.4

Answer

To solve the equation \( 592.5 - 156.7 = 278.4 + ? \), we will follow these steps:

### Step 1: Calculate \( 592.5 - 156.7 \)
First, we need to perform the subtraction on the left side of the equation.

\[ 592.5 - 156.7 \]

### Step 2: Perform the subtraction
Align the numbers and subtract:

\[ \begin{array}{r} 592.5 \\ - 156.7 \\ \hline \end{array} \]

Starting from the rightmost digit:
- \( 5 - 7 \) cannot be done, so we borrow 1 from the 2 (making it 1) and the 5 becomes 15. Thus, \( 15 - 7 = 8 \).
- Next, \( 1 - 6 \) cannot be done, so we borrow 1 from the 9 (making it 8) and the 1 becomes 11. Thus, \( 11 - 6 = 5 \).
- Finally, \( 8 - 1 = 7 \).

Thus,

\[ 592.5 - 156.7 = 435.8 \]

### Step 3: Set up the equation
Now we rewrite the equation with the result from Step 2:

\[ 435.8 = 278.4 + ? \]

### Step 4: Isolate the question mark
To find the value of \( ? \), we need to isolate it by subtracting \( 278.4 \) from both sides:

\[ ? = 435.8 - 278.4 \]

### Step 5: Perform the subtraction
Align the numbers and subtract:

\[ \begin{array}{r} 435.8 \\ - 278.4 \\ \hline \end{array} \]

Starting from the rightmost digit:
- \( 8 - 4 = 4 \)
- \( 5 - 8 \) cannot be done, so we borrow 1 from the 3 (making it 2) and the 5 becomes 15. Thus, \( 15 - 8 = 7 \).
- Finally, \( 2 - 2 = 0 \).

Thus,

\[ 435.8 - 278.4 = 157.4 \]

### Step 6: Conclusion
The value that will come in place of the question mark \( ? \) is:

\[ ? = 157.4 \]

### Final Answer
The answer is \( 157.4 \).

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