Question

Jun writes an expression 5(x+2).Then he uses the Distributive property to write the equivalent expression 5x+10. How can he substitute a value for the variable to check to see if expressions are equivalent?............................. the variable is x

Answer 1

I am not sure but I think this is what it means by.
You can substitute 4 for an example for x.
5(4+2) 5(4)+10
5(6) 20+10
30 30