Question

Which algebraic expression would not be equivalent if the number and the variable were reversed?

n+8
m-5
kx8
4+x

Answer 1

Test each one:
\[n+8=8+n\] TRUE

\[m-5=5-m\] FALSE

\[k8=8k\] TRUE

\[4+x=x+4\] TRUE


Only B is not true when swapped.