Problem
a) $3(x+y)=$
Solution
Step 1 ：We need to find the expression for 3 times the sum of x and y.
Step 2 ：expr = 3*x + 3*y
Step 3 ：\(\boxed{3(x+y) = 3x + 3y}\)
Step 1 ：We need to find the expression for 3 times the sum of x and y.
Step 2 ：expr = 3*x + 3*y
Step 3 ：\(\boxed{3(x+y) = 3x + 3y}\)
