if x =a ,y -b is the solution of equations x-y =2 and x+y=4 ,then the values of a and b are
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take x =a and y = -b then
a-(-b) = 2
a+b = 2 ist equation
second equation is
a-b = 4
then add both eq
a+b =2
a-b =4
2a =6
a = 3
then put value of a in ist equation
3+ b =2
b = -3+2
b= -1
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