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SVEN [57.7K]
3 years ago
8

-(2n-1)+6(n+3)=-4-(7n-11)

Mathematics
2 answers:
Oksana_A [137]3 years ago
5 0

Step-by-step explanation:

-2n+1+6n+3 = -4 -7n+11

4+4n = 7- 7n

4-7 = -7n- 4n

-3/-11 = -11n/-11

n= 3/11

DedPeter [7]3 years ago
4 0

Answer:

n = -12/11

Step-by-step explanation:

4n = -7n - 12

4n + 7n = -7n - 12+7n

11n = -12

11n/11 = -12/11

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5 0
4 years ago
Cherries $5 per pound and oranges per pound$2. He paid 18.00 for total weight which was 6 lbs how many pounds of cherries did Al
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Answer: 2 lbs of cherries

Cherries = $5 per pound
Oranges = $2 per pound
Total Cost = $18
Total weight = 6 lb

------------------------------------
Define x and y
------------------------------------
Let x be the number of lb of cherries
Let y be the number of lb of oranges

------------------------------------
Construct equations
------------------------------------
x + y = 6               ---------------------------- (1)
5x + 2y = 18         ---------------------------- (2)

------------------------------------------------------------------------
Solve x and y
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From equation (1):
x + y = 6 
x = 6 - y 

------------------------------------------------------------------------
Substitute x = 6 - y into equation 2
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5x + 2y = 18
5 (6 - y) + 2y = 18
30 - 5y + 2y = 18
3y = 30 - 18
3y = 12
y = 4

------------------------------------------------------------------------
Substitute y = 4 into equation (1)
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x + y = 6
x + 4 = 6
x = 2

------------------------------------------------------------------------
Find the weight of cherries and oranges
------------------------------------------------------------------------
Cherry = x = 2 lb
Oranges = y = 4 lbs 

------------------------------------------------------------------------
Answer: Alex bought 2 lb of cherries
------------------------------------------------------------------------
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3 years ago
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