Verified Answer :

15y + (x + 9y)

First, simplify. / Your problem should look like: \(15y + x + 9y\)
Second, gather the like terms. / Your problem should look like: \((15y + 9y) + x\)
Third, simplify. / Your problem should look like: \(24y + x\)

Answer: 24y + x

15y+x+9y

Combine Like Terms:

=15y+x+9y

=(x)+(15y+9y)

=x+24y