331,205 views
42 votes
42 votes
If x = 9 and 4x + 7 = y

Then 4(9)+7 = y

This is an illustration of which property?

User SharpEdge
by
3.0k points

1 Answer

15 votes
15 votes

Answer: Substitution property

Explanation:

It's substituting a variable into an equation.

User Charles Holbrow
by
2.6k points