Algebra I All-in-One For Dummies. Mary Jane Sterling

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math, math, and math. The last two denominators, math and math, have a common factor of x. And the product of all three denominators is 6x2. Divide the product by x and you get 6x. In long hand:

math

      27 math. The least common denominator is 24.

math math

      Or, leaving the whole number parts separate:

math

      29 math.

math

      30 math.

math

      31 math. Here’s a chance to use the box method.

math

      The least common denominator is math.

math

      32 math. Go ahead and put the negative sign in front of the work in the first step. With one of the three fractions being negative, you know that the answer will be negative.

math

      33 math. Change the first fraction to a mixed number.

math math

      35 math. The answer will be positive, because there are two negative fractions.

math

      36 math.

math

      37 math.

math

      38 math.

math

      39 math.

math

      40 4.

math math

      42 36,000. Simplify inside the parentheses first.

math math

      43 –2.999948. By the order of operations, you multiply first and then subtract 3 from the result.

math

      44 0.6. Dividing, you have math.

      45 math. math because math

math

      47 math. math.

      48 math.

      math because two digits repeat

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