Question

9. If x = a, y = b is the solution of the pair of equations x – y = 2 and x + y = 4, then the respective values of a and b are

Answer 1

Answer:

a=3

b=1

Step-by-step explanation:

x=a

y=b

x-y=2

a-b=2

x+y=4

a+b=4

(a-b)+(a+b)=2+4

a-b+a+b=6

b will be cancelled to 0

2a=6

a=6/2

a=3

a-b=2

3-b=2

3-2=b

b=1