Question

If 3x + 4y = 17 and 5x - 2y = 11, then x - y is
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Answer 1

Answer:

x-y=1

Step-by-step explanation:

3x+4y=17........(1)

5x-2y=11.........(2)

multiplying equation (2) by 2 we get,

10x-4y=22.......(3)

Adding equation (1) and (3),

10x-4y=22

+3x+4y=17

__________

13x =39

x=39/13

x=3

substituting x=3 in equation (1),

3*3+4y=17

9+4y=17

4y=17-9

4y=8

y=8/4

y=2

x-y=3-2=1

Therefore, the answer is 1

Answer 2

Answer:

Step-by-step explanation:

Given,

3x+4y = 17   - eq:1

5x-2y = 11    -eq:2

By Multiplying 2 In Eq:1 And 4 In Eq:2,

6x+8y = 34

20x-8y = 44

By Cancelling We Get:

26x = 78

x=3.

Then The Value Of y,

3x+4y = 17

3*3+4y = 17

4y = 17-9=8.

x-y = 3-8 = -5.