16 - n = 4
n = 12
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Either 2*(n-4) = 2n - 8 or 2n - 4 It depends on whether the "twice" operates on "the number decreased by 4" or "the number".
A number decreased by 4 is n-4
the answer to this is 0.032
I assume you mean that you want it rearranged to solve for n. 0.75 x n = 0.024 n=0.024/0.75 n=0.032
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