72 + 12 = 84
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3x4 is 12 So 12x6 is 72? but hard way add 12 plus 72 84 All factors of 12!
16 + 72(-8) + 6(-2) 16 - 576 - 12 = -572
12 19/72
x2 + 6x + 9 = 81 x2 + 6x = 72 x2 + 6x - 72 = 0 (x+12)(x-6) = 0 x= -12, 6 (two solutions)
A dozen is 12, so six dozen is 6 x 12 = 72. At $2.79 a dozen, it's $16.74 plus tax.