Algebra Tutorials!
Friday 29th of September
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 Depdendent Variable

 Number of equations to solve: 23456789
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 Solve for:

 Dependent Variable

 Number of inequalities to solve: 23456789
 Ineq. #1:
 Ineq. #2:

 Ineq. #3:

 Ineq. #4:

 Ineq. #5:

 Ineq. #6:

 Ineq. #7:

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 Ineq. #9:

 Solve for:

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# Adding and Subtracting Fractions

1. Addition and Subtraction when the denominators are the same:

To add or subtract fractions that have the same denominator, add or subtract the numerators to get the numerator of the answer and carry along the common denominator to get the denominator of the answer.

Example:

2. Addition and Subtraction when the denominators are not the same:

To add or subtract fractions that do not have the same denominator, find a common denominator, rewrite the fractions as equivalent fractions that have the common denominator, then add or subtract the numerators to get the numerator of the answer and carry along the common denominator to get the denominator of the answer.

Example:

 the LCD is 4 rewrite using the LCD add the numerators and carry along the LCD

3. Adding and Subtracting if the fractions have different denominators and you donâ€™t know the lowest common denominator: To â€œbuildâ€ the lowest common denominator, prime factor each denominator, and give each denominator (and numerator) the factors that it is missing from the other denominator.

Example: