Fouss math class wiki

 

Section 1 and 2 - Solving One and Two-Step Equations

Page history last edited by Fouss 1 yr ago

2.1-2.2 Solving One and Two Step Equations

 

Addition/Subtraction/Multiplication/Division

 

  Properties of Equality:   If a=b then...  

a+c=b+c

a-c=b-c

a x c=b x c

 

 eq=\frac{a}{c} = eq=\frac{b}{c}  (When eq=C\ne0)

 

Solution of an Equation- value of a variable that makes a situation true.

 

examples- x+5=10 (x=5), x-17=3 (x=20)

 

To solve an equation,you must use the opposites.

 

examples-

     x+17 = 20

       -17    -17

          x  = 3

 

 

 eq=\frac{x}{8} =   2

      x8   x8

       x =  16

 

 

To solve an equation with a fraction with the variable, you need to multiply by the reciprocal.

 

example-

eq=\frac{1}{4}x=3  

 

(eq=\frac{4}{1}) (eq=\frac{1}{4})x=3(4)

 

x=12            

 

To solve a two step equation, you do the same thing you would do in a one step equation but make sure you do the order of operation backwards!

 

example-

 

3x-4 = 12 

                                                                                                     +4    +4  

 

                                                                              3x     =  16

                                                                               3          3

 

                                                                                x      =  5.33

 

 

This clip shows how to do the steps in order for the one step equations

 

 

This video goes in to detail about how to put the steps together in order to find the anwser in two step equations.

 

 

 

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