a-(100-63)=38

To solve the equation \( a - (100 - 63) = 38 \), first simplify the expression inside the parentheses:

\[ 100 - 63 = 37 \]

Now substitute back into the equation:

\[ a - 37 = 38 \]

Next, add 37 to both sides to isolate \( a \):

\[ a = 38 + 37 \]

Calculating the right side gives:

\[ a = 75 \]

So, the solution is \( a = 75 \).