5n + 12 = 3n
Try to get all expressions with n on the left side
5n + 12 - 3n = 3n - 3n
2n + 12 = 0
Try to get rid of 12 on the left side
2n + 12 - 12 = -12
2n = -12
n = -12/2 = -6
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3n+5n=8n
7n - 2 + 3n + 4 = 7n + 3n - 2 + 4 = 10n + 2 which can be simplified to 2(5n +1)
first combine like terms and 5n+7=-41 add -7 to both sides 5n=-48 n=-48/5
(3n+2)(n+1)
-2