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X/X= 1

because X is cancelled by X. If X is not equal to 0

because X is cancelled by X. If X is not equal to 0

X/x = 1

x × 1 = x × 1

So,

x/x × 1 = 1 × 1

x/x = 1 × 1 / 1

x/x = 1

x × 1 = x × 1

So,

x/x × 1 = 1 × 1

x/x = 1 × 1 / 1

x/x = 1