Operations mistake
Algebra
Level
2
Vikram has been working with Order of Operations all day, and has a strong sense that
\[ (-a) + b = b - a, \]
but doesn't know why. How many of the \( 11 \times 11 \) ordered pairs of integers \( (a, b) \), where \(a\) and \(b\) are integers from 0 to 10 (inclusive) , are there, such that
\[ (-a) + b = b-a? \]
by
Arron Kau