Alaina+Boudreau+and+Eddie+Juarez

=**Solving equations using the __substitution__ method**= By. Alaina Boudreau and Eddie Juarez <3

Video by. Alaina
media type="youtube" key="it3vYdV_oyc?version=3" height="315" width="420"

Explanation by. Alaina
To solve an equation with the substitution method, you must first have one of the variables solved for. (Y= or X=) You then substitute the equation that starts with Y= or X= into the other equation where ever you see that variable. Next, you solve the equation to find what the variable equals, by using the order of operations. After you find what the first variable will equal, you put that number into the equation in place of said variable (substitute it) into the equation you have not yet solved for. Finally, you rewrite what each variable and what they are, to clearly show your answer.

Picture by. Alaina

Video by. Eddie media type="youtube" key="KNwwu5wjcaA?version=3" height="315" width="420"

Explanation by. Eddie In order to solve an equation using the substitution method is to start with 2 different equations. one starting with ( y= ) and the other for example 7x- 2y = 9. Second step is to take the y= equation and plug that in for Y in the second equation. Then simplify for both sides. Solve for X and Y. After you solve for one either one plug it back in and solve for the other variable.

Picture by. Eddie