Question

if x is equal to A Y is equal to b is the solution of the equation x minus Y is equal to 2 and X + Y is equal to 4 then find the value of a and b

Answer 1

X=a, y=b,
X-y=2 this is equation 1
X+ Y=4 this is equation 2
From eq 1 & eq 2 we get
a+b=2
a-b=4
2a=6
a= 6/2
a=3
a=3 substituting in eq 1
3-b=2
-b=2-3
-b= -1
b= 1