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SOVA2 [1]
3 years ago
8

2x + y = 7 3x - y = 3

Mathematics
1 answer:
Alona [7]3 years ago
7 0

Answer:

x = 2

y = 3

Step-by-step explanation:

2x + y = 7\\\\3x - y = 3 \ \ \ \ + \\\\------ \\\\5x  = 10 \\\\x = 2 \\\\------ \\\\2x + y = 7  \\\\y = 7 - 2x = 7 - 4 = 3

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Solve this system of linear equations. Separate
Arte-miy333 [17]

Answer:

x = -7, y = -1

Step-by-step explanation:

Solve the following system:

{3 y - 2 x = 11 | (equation 1)

2 y + 3 x = -23 | (equation 2)

Swap equation 1 with equation 2:

{3 x + 2 y = -23 | (equation 1)

-(2 x) + 3 y = 11 | (equation 2)

Add 2/3 × (equation 1) to equation 2:

{3 x + 2 y = -23 | (equation 1)

0 x+(13 y)/3 = -13/3 | (equation 2)

Multiply equation 2 by 3/13:

{3 x + 2 y = -23 | (equation 1)

0 x+y = -1 | (equation 2)

Subtract 2 × (equation 2) from equation 1:

{3 x+0 y = -21 | (equation 1)

0 x+y = -1 | (equation 2)

Divide equation 1 by 3:

{x+0 y = -7 | (equation 1)

0 x+y = -1 | (equation 2)

Collect results:

Answer: x = -7, y = -1

8 0
3 years ago
ASAP PLEASE <3A rectangular garden has length and width as given by the expressions below. Length: 4 − 7(3x + 4y) Width: 3x(−
creativ13 [48]

Answer:

  • 8 - 42x - 56y - 12xy

Step-by-step explanation:

<u>Given sides of a rectangle</u>

  • Length: l =4 − 7(3x + 4y)
  • Width: w = 3x(−2y)

<u>Perimeter of rectangle</u>

  • P = 2(l + w)

<u>Using the given values</u>

  • P = 2( 4- 7(3x + 4y) + 3x(-2y)) =
  • 2( 4 - 21x - 28y - 6xy) =
  • 8 - 42x - 56y - 12xy
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Not knowing the taxes the soda would be estimated to cost around 15$
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Answer:

Step-by-step explanation:

times the number so 18 times 30

5 0
4 years ago
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How many times does 1/4 go into 8 and how many times into -12


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3 years ago
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