Question

x+y=7,x-y=-1 solve the equation by using elimination method​

Answer 1

Answer:

Step-by-step explanation:

Given that x+y=7

x-y=-1

On adding equation 2 and 1 we get

2x=6

x=3

x+y=7

3+y=7

y=7-3

y=4

Answer 2

Answer:

x+y=7 -----------1

x-y=1 ------------2

by the eq 1

x+y=7

x=7-y --------3

putting the value of x in eq 2

x-y=1

7-y-y=1

7+2y=1

2y=1-7

2y=-6

y=-6/2

y=-3

putting the value of y in eq 3

x=7-y

x=7-(-3)

x=7+3

x=10

Therefore ,

x=10,y=-3