Solving Systems of Equations Using Elimination

What are the two methods to solve a system of equations we learned before break ?

Which system of equations do you think is "stacked" ?

What operation do you think would eliminate the "x" variables in the system: 

When we add the two equations, what is the new equation we've created ? 

 $3x+2y=7$  

 $-3x+4y=5$  

Now that we have 6y=12, what do you think we do ? 

 $3x+2y=7$  

 $-3x+4y=5$  

Look at the system of equations. How do you think you could start solving it. 

 $5x-3y\ =\ 16$  
 $x-3y=8$  

If we multiply the bottom equation by negative one, what would that new equivalent equation be ? 

 $5x-3y\ =\ 16$  
 $x-3y=8$