Complete the blanks so that both sides of the equation are equal.
 
(a) 225 \(+\) \(=\) 266 \(+\) 29
 
(b) 123 \(-\) 48 \(=\) 142 \(-\)
 
(c) 116 \(+\) 34 \(=\) 167 \(-\)