Algebra: Chapter 3-5
More on Solving Equations
Solve equations by first getting all variables on the same side of the equation. Get rid of the paranthesis too (distributive property if required). Go slow and ONCE YOU HAVE YOUR ANSWER, PLUG IT BACK IN TO SEE IF IT WORKS, IF NOT, CHECK YOUR MATH FOR SIMPLE MATH OR SIGN ERRORS!
Click here for some more examples. Don’t forget to try out Nutshellmathplus.com too!
Intro to Algebra: Chapter 2-4
Subtraction of Rational Numbers
Today, we are working on subtraction of rational numbers. Remember, just do the inverse of subtraction and ADD the inverse (or opposite) of the number to the other number.
Examples:
- -5 – 7 is really -5 + (-7) remembering that the + sign is invisible. So this becomes just -5 + (-7) and remembering the adding rule of 2 negatives, the answer becomes -12.
- -4 – (-5) is really -4 + 5 because 2 negative are a positive (bing-bing! from Ms. Phillips) and the answer is +5 – 4 and the final answer is +1