Week 15 – Solving Rational Expressions

This week in math we learned how to actually solve the equation (solving for x)

 Here’s how to do it.

for example number one, 

  1. I cross multiplied to simplify
  2. I got my variable on one side of the equation
  3. I isolated “x”
  4. REMEMBER TO LIST NON-PERMISSIBLE VALUES

for example number two, it’s a bit more complicated

  1. Get the factor to have a common denominator
  2. Instead of making just the denominator common multiply everything by the common denominator (Numerator and Denominator)
  3.  Cancel out zero pairs (when a factor in the numerator is equivalent to the factor on the denominator)
  4. Expand (FOIL)
  5. Get variables on one side of the equation.
  6. Isolate for “x”
  7. LIST NON-PERMISSIBLE VALUES.

Things to remember;

  • Only cross-multiply when there are two values.
  •  Make sure to cancel out zero pairs
  • Multiply the whole thing by the common denominator