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3n+2(−2n−1) evaluate

2 Answers

7 votes
The answer is N= -2 Simplifying
3n + 2(-2n + -1) = 0

Reorder the terms:
3n + 2(-1 + -2n) = 0
3n + (-1 * 2 + -2n * 2) = 0
3n + (-2 + -4n) = 0

Reorder the terms:
-2 + 3n + -4n = 0

Combine like terms: 3n + -4n = -1n
-2 + -1n = 0

Solving
-2 + -1n = 0

Solving for variable 'n'.

Move all terms containing n to the left, all other terms to the right.

Add '2' to each side of the equation.
-2 + 2 + -1n = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -1n = 0 + 2
-1n = 0 + 2

Combine like terms: 0 + 2 = 2
-1n = 2

Divide each side by '-1'.
n = -2

Simplifying
n = -2
User Max Kanter
by
3.7k points
4 votes

Answer:

-n-2

Explanation:

First do 2(-2n) and 2(-1)

You get -4n-2

Then add 3n to the equation

3n-4n-2

Combine Like Terms

3n-4n=-n

Final Answer:

-n-2

User SabDeM
by
4.1k points