Question

S.
If a= 21,b=-11 and c= -5, verify
a. (a + b) +e=a +(6+)​

Answer 1

e=17

Step-by-step explanation:

(a+b)+e=a+6

21+(-11)+e=a+6

10+e=a+6

10+e=21+6

10+e=27

do RHS

e=27-10

e=17