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Kay [80]
3 years ago
13

Can someone explain what's n+1-3n=-5+n+1-2

Mathematics
2 answers:
son4ous [18]3 years ago
8 0
N+1-3n=5+n+1-2

Simplify it

-2n+1 = n+4

Add 2n to both sides

1 = 3n+4

Subtract 4 from both sides

-3 = 3n

Divide by 3

n = -1
trapecia [35]3 years ago
5 0
N + 1 - 3n = -5 + n + 1 - 2

Combine like terms:

n - 3n = -2n

-2n + 1 = -5 + n + 1 - 2

Combine like terms:

-5 + 1 - 2 = -6

-2n + 1 = n - 6

Subtract 'n' to both sides:

-3n + 1 = -6

Subtract 1 to both sides:

-3n = -7

Divide -3 to both sides:

n = 2 1/3 or 7/3
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7 0
3 years ago
Can you help me, please
mars1129 [50]

Answer:

you: 25h + 100

friend: 20h + 120

same amount of pages: 4 hours

Step-by-step explanation:

Every hour you read 25 pages. I used h to represent hour. It doesnt really matter. That starts your equation at 25h. You already read 100 pages, so we simply add 100 and thats your equation. We use the same thinking for the friend's equation.

To find how many hours it will take for them to read the same amount, we write the equations as an equality. Because we need them to be the same, see?

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5 0
3 years ago
What is the solution set of 2x^2+x=15<br>○3,-5/2<br>○-3,5/2<br>○2,-3/2
kozerog [31]
Rewrite 2x^2+x=15 as <span>2x^2+ x - 15 = 0.  Use your favorite method to solve this for x.  I prefer synthetic div., so will check out whether or not 2 is a root:

     ____________
2  /   2     1     -15
               4      10
    ---------------------
       2      5      -5   Since there is a non-zero remainder, 2 is NOT a root.  Eliminate the 3rd answer choice.

Try -3.  If used as a divisor in synth. div., will the remainder be zero or not zero?  If zero, then -3 is a solution / root.  

And so on.</span>
7 0
4 years ago
Read 2 more answers
What is w when 6w-19=3w-4
marysya [2.9K]

6w - 19 = 3w - 4 \\ 3w = 15 \\ w = 5

Answer : w = 5

Hope this helps. - M
7 0
3 years ago
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