3n = 618
n = 618 ÷ 3
n = 206
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3n and n = 4? 3n ( the four replaces the n 3(4) = 12 =======
3n-11 = 19 3n = 19+11 3n = 30 Divide both sides of the equation by 3 to find the value of n: n = 10
n = 3 3n x 2 = 18 3n x 2 / 2 = 18 / 2 3n = 9 3n / 3 = 9 / 3 n = 3
n=21
3n+20=170 subtract 20 3n=150 divide by 3 n=50