SOLUTION: Combine like terms: 4y - z + 3y Multiple Choice answers. A) 7y - z B) 6yz C) 3y + 3z D) 6y + z The answer I keep getting is below and it does not match any of my choices. Si

Algebra ->  Exponents-negative-and-fractional -> SOLUTION: Combine like terms: 4y - z + 3y Multiple Choice answers. A) 7y - z B) 6yz C) 3y + 3z D) 6y + z The answer I keep getting is below and it does not match any of my choices. Si      Log On


   

Question 70776: Combine like terms: 4y - z + 3y
Multiple Choice answers.
A) 7y - z
B) 6yz
C) 3y + 3z
D) 6y + z
The answer I keep getting is below and it does not match any of my choices.
Simplifying
4y + -1z + 3y
Reorder the terms:
4y + 3y + -1z
Combine like terms: 4y + 3y = 7y
Final result:7y + -1z
Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
4Y-Z+3Y
7Y-Z ANSWER A)
QUESTION --- WHY DO YOU ADD THE-1 IN FRONT OF THE Y TERM?
THE 1 IS ALWAYS ASSUMED IF THERE IS NO NUMERIC VALUE BEFORE THE UNKNOWN TERM.
-1Y=-Y=-1Y/1=-Y/1 THESE ARE ALL THE TERMS WRITTEN DIFFERENTLY BUT HAVE THE SAME VALUE.