Answer:
On simplification,
Step-by-step explanation:
Here, the given expression is:
Now, we can perform operations only on LIKE TERMS,
So, in this expression, separate the like terms we get:
Hence, on simplification,
7x-2-(3x-9)-(x+7)
=7x-2-3x+9-x-7
=7x-3x-x-2+9-7
=3x
9:23 simple