MathDB

Sam Wang decides to evaluate an expression of the form

x +2 \cdot 2+ y

. However, he unfortunately reads each ’plus’ as a ’times’ and reads each ’times’ as a ’plus’. Surprisingly, he still gets the problem correct. Find

x + y

.
Proposed by Edwin Zhao
Solution.

\boxed{4}

We have

x+2*2+y=x \cdot 2+2 \cdot y

. When simplifying, we have

x+y+4=2x+2y

, and

x+y=4

Problem Statement