Hey there!
9y + 5 = 3y + 1 + 6y + 4
9y + 5 = 9y + 5
SUBTRACT 9y to BOTH SIDES
9y + 5 - 9y = 9y + 5 - 9y
SIMPLIFY IT!
NEW EQUATION: 5 = 5
SUBTRACT 5 to BOTH SIDES
5 - 5 = 5 - 5
0 = 0
Therefore, your answer is:
All real numbers
Good luck on your assignment and enjoy your day!
~Amphitrite1040:)