n8c9apsensjohn n8c9apsensjohn

06-02-2017
Mathematics

contestada

Why are the equations w - x x = w and w x - x = w called identities?

Respuesta :

18-02-2017

They are called identities because:
w-x = 0
w = x (carry x to the other side) is the same as x = w

in the other case:
wx-x = w / divide by w on both side
x -x = 0
x = x (carry x to the other side)

In both cases the equations are the same.

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