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Solve the system of equations by using substitution. –2x + 3y = 7 4x – 6y = 8 A. y = –22, x = 29.5 B. y = –22, x = –36.5 C. y = –22, x = –31 D. no solution
–2x + 3y = 7, -2x = 7 - 3y x = (3/2)y - 7/2 Replace x in the equation 4x – 6y = 8, then 4(3/2y - 7/2) - 6y = 8 6y - 14 - 6y = 8, the simplified form is 0 = 22 which is not true. Therefore, the solution for –2x + 3y = 7 4x – 6y = 8 is D. no solution.
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Asked 3/26/2014 5:08:35 PM
Updated 3/26/2014 10:48:56 PM
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–2x + 3y = 7,
-2x = 7 - 3y
x = (3/2)y - 7/2
Replace x in the equation 4x – 6y = 8, then 4(3/2y - 7/2) - 6y = 8
6y - 14 - 6y = 8, the simplified form is 0 = 22 which is not true.
Therefore, the solution for –2x + 3y = 7 4x – 6y = 8 is D. no solution.
Added 3/26/2014 10:48:56 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [3/26/2014 10:49:56 PM]
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Simplify 4f + 3g – f + 7g by combining like terms. A. 4f + 10g B. 3f + 10g C. 13fg D. 14fg
Question
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Updated 3/19/2014 5:49:08 PM
1 Answer/Comment
4f + 3g – f + 7g = 3f + 10g
Added 3/19/2014 5:49:08 PM
This answer has been confirmed as correct and helpful.
In the expression 2(x+4) – 12 = 44, x = 24. A. True B. False
Question
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Updated 3/21/2014 4:21:10 PM
1 Answer/Comment
In the expression 2(x+4) – 12 = 44, x = 24. True.
2(x+4)-12=44
2x+8-12=44
2x-4=44
2x=48
x=48/2
x=24
Added 3/21/2014 4:21:10 PM
This answer has been confirmed as correct and helpful.
Solve 11x – 7 = 7x + 13. A. B. x = 5 C. x = -2 D. x = 7
Question
Updated 3/21/2014 4:18:17 PM
1 Answer/Comment
11x – 7 = 7x + 13

11x - 7x = 13 + 7

4x = 20

x = 20/4

x = 5
Added 3/21/2014 4:18:17 PM
This answer has been confirmed as correct and helpful.
Confirmed by andrewpallarca [3/21/2014 4:18:59 PM]
The expression | 2 + 4n | - 4 = 14 produces the answers n = 4 and n = 5. A. True B. False
Weegy: Solve: -6 - 4n = 10 n Answer: n = -3/7 or -0.42857 (More)
Question
Updated 3/22/2014 9:52:16 AM
1 Answer/Comment
The expression | 2 + 4n | - 4 = 14 produces the answers n = 4 and n = 5. B. False.

| 2 + 4n | - 4 = 14
| 2 + 4n | = 14 + 4 = 18
2 + 4n = 18 or - 18
4n = 16 or -20
n = 4 or -5
Added 3/22/2014 9:52:16 AM
This answer has been confirmed as correct and helpful.
Confirmed by andrewpallarca [3/22/2014 10:03:24 AM]
Solve w + 12 = –6 – 2w. A. w = -6 B. w = 6 C. w = -18 D. w = 18
Weegy: 5[2w3] = 180 (More)
Question
Updated 3/22/2014 9:48:22 AM
1 Answer/Comment
w + 12 = –6 – 2w
w + 2w = - 6 - 12
3w = -18
w = -6
Added 3/22/2014 9:48:22 AM
This answer has been confirmed as correct and helpful.
Confirmed by andrewpallarca [3/22/2014 9:52:31 AM]
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