Question

Subtract. Write the difference in simplest form.

(5n - 3) - (-2n + 7)

3 n - 10
7 n + 4
3 n + 4
7 n - 10

Answer 1

7n - 10

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.