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Solnce55 [7]
3 years ago
5

Which ordered pair (x, y) is a solution to given system of linear equations?

Mathematics
2 answers:
Jet001 [13]3 years ago
7 0

Answer: (1,-2)

Step-by-step explanation:

Given : the system of linear equations :-

3x+y=1---------------(1)\\5x+y = 3---------------(2)

In order to find x and y , first we subtract equation (1) from equation (2) , we get

2x=2

Divide both sides by 2 , we get

x=1

Substitute the value of x=1 in equation (1) , we get

3(1)+y=1\\\\3+y=1

Subtract 3 from both sides , we get

y=-2

Hence, the ordered pair (x, y) is a solution to given system of linear equations = (1,-2)

Thus , the correct answer is  (1,-2) .

riadik2000 [5.3K]3 years ago
3 0

Answer:

(1, - 2 )

Step-by-step explanation:

Given the 2 equations

3x + y = 1 → (1)

5x + y = 3 → (2)

Subtracting (1) from (2) term by term eliminates the term in y, that is

(5x - 3x) + (y - y) = (3 - 1) and simplifying

2x = 2 ( divide both sides by 2 )

x = 1

Substitute x = 1 in either of the 2 equations for corresponding value of y

Using (1), then

3 + y = 1 ( subtract 3 from both sides )

y = - 2

Solution is (1, - 2 )

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let x y minutes be the time for pipes to fill the tank, let n be the water needed to fill the tank.

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