Let x be the amount of the discount.
We have, 22 - x = $16
We change the writing of the equation:
22 - x + x = 16 + x
So, 22 = 16 + x
We then Remove 16 from both sides:
22 - 16 = 16 + x - 16
So, 22 - 16 = x
So, the amount of the discount is x = $<<6=6>>6.
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