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If A + B = 2C and C + D = 2A, then
A) A + C = B + D
B) A + C = 2D
C) A + D = B + C
D) A + C = 2B
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Number Systems
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Answer ( 1 )
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Answer-A
Firstly add both the equations
i.e A+B+C+D=2A+2C
Now find the value of B+D
i.e B+D=2A+2C-A-C
B+D=A+C
or
A+C=B+D