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2n plus 7 equals 19 2n equals 12 n equals 6
6=(1-2n)+5 6-5=(1-2n)+5-5 1=1-2n 1-1=1-1-2n 0=-2n 0/-2=-2n/-2 0=n
2n-9=-4
Given that 2n = 6 + n, subtract n from each side and n = 6
n = 5Multiply each side of the equation b y 2:2n = 10