please answer me fast it's of IcSe board .
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Hope this is OK for you completely
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x_y= -4/7-2/5 = -34/35
y-x = 2/5-(-4/7)
= 2/5+4/7
= 34/35
therefore , x-y is not equal to y-x
-(X+y) = 4/7-2/5
= 6/35
(-x) + (-y) = 34/35
therefore , -(X+y) is not equal to (-x)+(-y)
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