solve 21r-8n-8 - (12r-4n-16) for getting the value of "n"?
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we cannot solve it because it is not an equation , it is an expression .
we can simplify it
21r-8n-8 -(12r-4n-16)
= 21r-8n-8-12r+4n+16
=(21-12)r -(8-4)n -8+16
= 9r -4n+8
we can simplify it
21r-8n-8 -(12r-4n-16)
= 21r-8n-8-12r+4n+16
=(21-12)r -(8-4)n -8+16
= 9r -4n+8
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