Question

If x+y = 6 and 3x-y = 4 then x-y is equal to​

Answer 1

Answer:

-1

Step-by-step explanation:

x+y=6.....1

3x-y=4....2

By addition

x+y=6

3x-y=4

_______

4x=10

x=10/4

x=2.5

Putting the value of x=2.5 in equation 1,

2.5+y=6

y=6-2.5

y=3.5

therefore,

x-y=2.5-3.5

=-1

Answer 2

Answer:

x+y=6----------(i)

3x-y=4---------(ii)

adding i with ii

x +y=6

3x-y=4

_______________

4x=10

x=10/4

x=5/2

----------------------------

putting the value of x in i

5/2 + y = 6

5+2y=12

2y=7

y=7/2

___________________

=x-y

=5/2 - 7/2

=-2/2

=-1

hence x-y = -1

Step-by-step explanation: