3n + 6 = -9
Subtract 6 from both sides: 3n = -15
Divide both sides by 3: n = -5
Therefore n = -5
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n=6
3 + 3n = 9 + 2n + 4n n = -2
3n = 15 + 12 = 27, 27/3 = 9 = n
3n - 9 + 4n = 8nCombine like terms:7n - 9 = 8nSubtract 7n from both sides:-9 = n
Let's give it a go:3n - 6 = 9Add 6 to each side of the equation:3n = 15Divide each side by 3:n = 5