Question

If x-y=3, x+y=5, then x-y=

Answer 1

Answer:

3 answer should be 3

Step-by-step explanation:

take x-y=3 equation 1

and

x+y=5 equation 2

now subtracting 2 and 1

x-y=3

x+y=5

ans: 2x=8

x=8/2

x=4

now putting the value of x in equation 1

4-y=3

-y=3-4

-y=-1

canceling the minus on both side,we get,

y=1

now solve the equation no.3

x-y=?

now put the value of x and y from above we get

4-1=?

3

Answer 2

Answer:

x=4

x-y=3

x+y=5

x+y+x-y=3+5

cut -y with +y

x+x=8

2x=8

x=8÷2=4

then,x=4

putting x=4 in 1 equation we get

4-y=3

-y= 3-4= -1

-y= -1

both minus will be cut

then, y=1

putting x=4 and y=1 in 3 equation we get

4-1=3

then , x-y=3