The answer is 37, because you substitute n in 5 to 12 plus 5n, the answer is 37.Hope it is correct.
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5n+4=0 5n=-4 n= -4/5
-5n+9=-46 -5n+9-9=-46-9 -5n=-55 -5n/-5=-55/-5 n=11
5n + 7 = -41 5n = -48 n = -48/5 n = -9.6
-5n - (-2) = 27 -5n + 2 = 27 -5n + 2 - 2 = 27 - 2 -5n = 25 -5n/-5 = 25/-5 n = -5
N= -2 5 * -2 is -10 -10 +2 is -8