Question

x+y+6/20 = x/9 find x+y

Answer 1

Answer:

x+y

20

+

x−y

3

=7 and

x−y

8

−

x+y

15

=5

Medium

Solution

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Correct option is A)

x+y

20

+

x−y

3

=7 ...(1)

x−y

8

−

x+y

15

=5 ...(2)

Multiplying eq(1) with 3 we get,

x+y

60

+

x−y

9

=21 ...(3)

Multiplying eq(2) with 4 we get,

x−y

32

−

x+y

60

=20 ...(4)

Adding eq(3) and eq(4), we get

x−y

41

=41=>x−y=41 ...(5)

Substituting x−y=41 in the eq(1), we get

x+y

20

+

1

3

=7=>

x+y

20

=4=>x+y=5 ... (6)

Adding eq(5) and eq(6), we get

2x=6=>x=3

Substituting x=3 in the eq(5), we get

3−y=1=>y=2

Answer 2

Answer:

Here is the answer

Step-by-step explanation:

x+y

20

+

x−y

3

=7 and

x−y

8

−

x+y

15

=5

Medium

Solution

verified

Verified by Toppr

Correct option is A)

x+y

20

+

x−y

3

=7 ...(1)

x−y

8

−

x+y

15

=5 ...(2)

Multiplying eq(1) with 3 we get,

x+y

60

+

x−y

9

=21 ...(3)

Multiplying eq(2) with 4 we get,

x−y

32

−

x+y

60

=20 ...(4)

Adding eq(3) and eq(4), we get

x−y

41

=41=>x−y=41 ...(5)

Substituting x−y=41 in the eq(1), we get

x+y

20

+

1

3

=7=>

x+y

20

=4=>x+y=5 ... (6)

Adding eq(5) and eq(6), we get

2x=6=>x=3

Substituting x=3 in the eq(5), we get

3−y=1=>y=2