Question

substitution x+y=3, X-y=1​

Answer 1

Answer:

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Answer 2

Answer:

x=3/2 , y=-3/2

Step-by-step explanation:

= x-y=3 ________ (1)

= x+y=0 ________(2)

from equation (1) ,

y = x-3

• substitute the value of y in equation 2 :

x+y=0

x+x-3=0

2x=3

= x= 3/2 .

• now ,substitute x=3/2 in equation 1 :

x-y=3

3/2-y=3

y=3/2 - 3

y=-3/2

》》》 therefore, the solution is : x= 3/2 and y = -3/2