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jkw8886 ∙
Nitrogen
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-n/7+19=-3 -n/7=-22 n/7=22 n=22(7) n=154
N * 7
n/7 = 6+5 n/7 = 11 n = 11 X 7 n = 77
n/7 = 12 Therefore, n = 12 x 7 n = 84
n - 7 = 9 n = 16