Problem
$(4+x) \cdot 3=16$
Solution
Step 1 ：\( (4+x) \cdot 3 = 16 \)
Step 2 ：\( 3(4+x) = 16 \)
Step 3 ：\( 12 + 3x = 16 \)
Step 4 ：\( 3x = 4 \)
Step 5 ：\(\boxed{x = \frac{4}{3}}\)
Step 1 ：\( (4+x) \cdot 3 = 16 \)
Step 2 ：\( 3(4+x) = 16 \)
Step 3 ：\( 12 + 3x = 16 \)
Step 4 ：\( 3x = 4 \)
Step 5 ：\(\boxed{x = \frac{4}{3}}\)
