Question

3x+9=8,(x= -1)

Check weather the value given in the bracket is a solution to the given equation or not

Answer 1

no its not a solution because 3(-1)+9=8 would equal 6=8 

Answer 2

3(-1)+9=8
-3+9=8
6=8❌

So x= -1 is not a solution for the equation 3x+9=8