Question

If x, y and z are integers then (x+___ ) + z = _____ + (y + _____ ) Fill in the blanks to make the statements true.

Answer 1

( x + y) + z = x +( y+ z)
                         0r
                     z + ( x+ y)

Answer 2

The answer is:

(x + y) + z = x + (y + z)