Question

solve 2(x+3)=8 if x=2

Answer 1

There is no answer because 2x2 is four plus three makes 7 and 2+3 is 5 and 5x2 is 10

Answer 2

2(x+3)=8
x = 2

Substitute the values. 

2(2+3) = 8
4+6 ≠ 8
10 ≠ 8

This statement is false. 10 does not equal 8