if a = x -2,b=y+ 2 and c= - x + 2y show that a+b+c=3y
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Step-by-step explanation:
a=x-2
b=y+2
c= -x+2y
LHS:
a+b+c=x-2+y+2-x+2y
=3y
=RHS
hence proved
a+b+c=3y
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