6+а-а= 7-б+б=

Question

6+а-а= 7-б+б=

Answer 1

6+а-а=6,

7-б+б=7

Answer 2

6 + a - a = 6 + (a - a) = 6 + 0 = 6 7 - b + b = 7 + (b - b) = 7 + 0 = 7