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.

Question

Asked 3/26/2014 5:08:35 PM

Updated 3/26/2014 10:48:56 PM

1 Answer/Comment

Rating

8

–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.

-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]

Simplify 4f + 3g – f + 7g by combining like terms.
A.
4f + 10g
B.
3f + 10g
C.
13fg
D.
14fg

Question

Not Answered

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

Not Answered

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

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

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

| 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

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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