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Mathematics 13 Online
OpenStudy (anonymous):

the difference of two numbers is twice the first number

OpenStudy (zzr0ck3r):

a-b is the diffference of two numbers twice the first number is 2a( if the first number is talking about the order of the difference )

OpenStudy (anonymous):

12-4 = 8 = twice of 4 !! ;)

OpenStudy (zzr0ck3r):

or 0-0 = 2*0 there are many answers

hartnn (hartnn):

any 2 numbers whose sum is 0 can also be answer pairs.

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