Question

41 + 42 = 83

Explanation:

Step1: Identify the operation

We need to find the number that when added to 42 gives 63. Let the unknown number be \( x \), so the equation is \( x + 42 = 63 \).

Step2: Solve for \( x \)

Subtract 42 from both sides of the equation: \( x = 63 - 42 \).
Calculate \( 63 - 42 = 21 \).

Answer:

21