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It is known that ABCD is four different rational numbers, and the absolute value of 1 plus a is equal to the absolute value of 1 plus B, and the absolute value of 2 minus C is equal to 2 minus D How much is a plus B plus C plus D
It is known that ABCD is four different rational numbers with
|1+a|=|1+b|
So 1 + a = - (1 + b)
We get a + B = - 2
|2-c|=|2-d|
So 2-C = - (2-D)
We get C + D = 4
a+b+c+d=2
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