Answer:
7n - 10
Step-by-step explanation:
Whenever we have a "-" in front of an expression, the expression's signs change. For example:
- (a - b) = -a + b
The last part of the expression is:
- (-2n + 7) Which will be
2n - 7
So, we now have:
(5n - 3) + (2n - 7)
We can take away the parenthesis, so we have:
5n -3 + 2n - 7
We add up the variables and the numbers and have:
5n + 2n = 7n
-3 -7 = -10
Our answer is
7n - 10
The last answer choice is right.
