12 - 2 = 10
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10 - 12 = -2
x2_12x-3 = 0 Using the formula for solving quadratics: x = 12 plus/minus sqrt (144 - (4 x 1 x -3))/2 x = 12 plus/minus (sqrt 156)/2 x = 12 + (sqrt 156)/2 = 12.25 or x = 12 - (sqrt 156)/2 = -0.25
12 minus 1/3 equals 11 and 2/3.
11/12 minus 2/3 is 1/4.
To answer this by hand, you would need to change the 2/3 to 8/12. 8/12-2/12=6/12 or 1/2.