Help with math equations.10 points 4 u.?

Question

2 -1=1/2x+7/2
5n-1/3(3n-6)+1/4(8n+2)

Answer 1

2 - 1 = 1/2x + 7/2

1 = 1/2x + 7/2

2(1) = 2(1/2x) + 2(7/2)

2 = x + 7

2 - 7 = x + 7 - 7

- 5 = x

- - - - - - - - - - - - -

5n - 1/3(3n - 6) + 1/4(8n + 2) = 0

12(5n) - 12(1/3)(3n - 6) + 12(1/4)(8n + 2) = 0

60n - 4(3n - 6) + 3(8n + 2) = 0

60n - 12n + 24 + 24n + 6 = 0

72n + 30 = 0

72n + 30 - 30 = 0 - 30

72n = - 30

72n / 72 = - 30 / 72

n = - 30 / 72

n = - 5/12

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Check

5n - 1/3(3n - 6) + 1/4(8n + 2) = 0

5(- 5/12) - 1/3[3(- 5/12) - 6] + 1/4[8(- 5/12) + 2] = 0

- 25/12 - 1/3[- 15/12 - 6] + 1/4[- 40/12 + 2] = 0

- 25/12 - 1/3[ - 15/12 - 72/12] + 1/4[ - 40/12 + 24/12] = 0

- 25/12 - 1/3[- 87/12] + 1/4[ - 16/12] = 0

- 25/12 + 87/36 + [ - 16/48] = 0

- 25/12 + 87/36 - 16/48

Common denominator is 144

- 300/144 + 348/144 - 48/144 = 0

Working - 300/144 and + 348/144

48/144 - 48/144 = 0

0 = 0

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The solution set is { - 5/12 }

- - - - - - - - -s-

Answer 2

2-1=1/2x+7/2
1 =1/2x+7/2
-7/2 -7/2
____________
-2 and1/2 =1/2x
_______ =____
1/2x 1/2x

-5 = x

The answer is -5..so that means that x= -5


5n-1/3(3n-6)+1/4(8n+2)
For this problem, the answer is 2...n=2
I didn't show my work because it is very hard to type it and veryconfusing..so i did it on paper....i know this answer is correct..!


So overall, number 1 =-5 and number 2=2.

Answer 3

The answer is number 5

Answer 4

the answers are

1. x = -5
2. n = -3/4

you can check out the solutions from: (i uploaded em for you)

problem 1: http://www.putfile.com/pic.php?img=5537820
problem 2: http://www.putfile.com/pic.php?img=5537821

pls disregard my email. i thought i cud email pictures. lol. good luck!

Answer 5

x = -5

not sure what you're after on the second one.