To find what must be subtracted from \(3x + 8xy + 9y\) to get \(7x - xy + 8y\), you can perform subtraction by subtracting the second expression from the first one:
\((3x + 8xy + 9y) - (7x - xy + 8y)\)
When you subtract, remember to distribute the negative sign within the brackets:
\(= 3x + 8xy + 9y - 7x + xy - 8y\)
Now, let's simplify this expression by combining like terms:
Answers & Comments
Answer:
-4x + 9xy + y
Step-by-step explanation:
To find what must be subtracted from \(3x + 8xy + 9y\) to get \(7x - xy + 8y\), you can perform subtraction by subtracting the second expression from the first one:
\((3x + 8xy + 9y) - (7x - xy + 8y)\)
When you subtract, remember to distribute the negative sign within the brackets:
\(= 3x + 8xy + 9y - 7x + xy - 8y\)
Now, let's simplify this expression by combining like terms:
\(= (3x - 7x) + (8xy + xy) + (9y - 8y)\)
This simplifies to:
(= -4x + 9xy + y)