Ask Question
MathematicsMathematics
27 October, 09:28

How to solve 3n+9=7n-15

+4
Answers (2)
  1. 27 October, 09:33
    0
    Simplifying 3n + 9 = 7n + - 15

    9 + 3n = 7n + - 15

    9 + 3n = - 15 + 7n

    9 + 3n = - 15 + 7n

    9 + 3n + - 7n = - 15 + 7n + - 7n

    3n + - 7n = - 4n 9 + - 4n = - 15 + 7n + - 7n

    7n + - 7n = 0 9 + - 4n = - 15 + 0 9 + - 4n = - 15

    9 + - 9 + - 4n = - 15 + - 9

    9 + - 9 = 0 0 + - 4n = - 15 + - 9 - 4n = - 15 + - 9

    -15 + - 9 = - 24 - 4n = - 24

    Divide each side by - 4

    n = 6
  2. 27 October, 09:37
    0
    The answer to this problem is 6
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “How to solve 3n+9=7n-15 ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers
You Might be Interested in
When Tom purchased a new motorcycle, he paid a 5% sales tax. The amount of sales tax he paid was $265. What was the total cost of the motorcycle including the sales tax?
Answers (1)
Answer for 701 km - 523 km 445m
Answers (1)
Definitions need to be proven true or false
Answers (1)
Write a real world problem that involves multiplying two expressions with exponents. Then solve.
Answers (1)
What is the difference between this sequence type and the overarching umbrella of linear relationships
Answers (1)
New Questions in Mathematics
In the diagram below, QRS is an equilateral triangle and RT QS.
Answers (1)
What is the solution of this system of linear equations? y=2x-3 2x=y-3 a. infinitely many solutions b. (0, - 3) c. (0,0) d. no solution
Answers (1)
In calm waters, the oil spilling from the ruptured hull of a grounded tanker spreads in all directions.
Answers (1)
When does a barbershop quartet have 16 legs?
Answers (1)
According to the model how many more pizzas are sold for each additional coupon issued
Answers (2)
Home » Mathematics » How to solve 3n+9=7n-15
Sign Up Forgot Password?