N/-2-1=9 ????
(n/-2) - 1 = 9
we'd cross the -1 over the equality sign making it +1
so we'd have,
(n/-2) = 9 + 1
which gives;
(n/-2) = 10
open the brackets
n/-2 = 10
to solve for n, we cross multiply both sides remembering that 10 is the same as 10/1
so we'd have;
n * 1 = -2 * 10
giving
n = -20
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