Question

Lily said that n=3 is a solution of the equation 16+n=18.Is Lily correct ?Explain

Answer 1

No because if we subsitut 3 for n we gtet

16+3=18
19=18
false
she is wrong becuase 19=18 is wrong

Answer 2

No, Lily is not correct. This is because 16+3 does not equal 18. So to find N, you take 18 and subtract 16. 
18-16=n 
18-16=2
so n=2
16+2=18.