817 Math Blog (2015)

https://www.smore.com/h71kx-making-sense-of-math

                                                             



Hi. Welcome to my scribe post about 2 step Algebra. In our previous math class Mr. Harbeck taught us how to solve 2 step problems.

The two problems I will be solving are:
3x-7+2x=9
-n+5+21n=0

Here is how you solve it:

                                                                    
         3x-7+2x=9                                      
        5x-7+7=9+7                                                        
             5x=16
              5     5
              x=3.2

First Step: Do Combining Like Terms by adding 3x and 2x to make it into 5x
Second Step: Re-write the problem so that the coefficient, variable, and constant goes first and the answer is last. Make sure to take away the -7 out by adding +7 which will give you 9+7=16
Third Step: After that you get 5x=16. To isolate the variable, you will need to divide 5x and 16 by 7
x=3.2


Here is how you solve the second question:


                     -n+5+21n=0
                        20n+5=0
                     20n+5-5+0-5
                         20n=-5 ÷ 5
                         20   20 ÷ 5
                             x=-¼

First Step: Combining Like Terms. Add -n (-1n) and 21n
Second Step: Re-write the question,make sure to take away the +5 by adding -5 to it.
Third Step: When you get 20n=-5, you divide that by 5/5. 
x=-¼