Day 3 Mckenzie N. Mackenzie H.
Daily objective-students will be able to solve system of equations by addition/subtraction
http://www.youtube.com/watch?v=nTF6Kp_icFo
Quiz-
1.x-2y=14
x+3y=9
2.-x-3y=-1
x+4y=3
3.x-4y=18
x+3y=4
Answer key
1.x-2y=14 x-2(-1)=14
-(x+3y=9) x+2=14
-5y=5 -2 -2
-5=5y x=12
y=-1
2.-x-3y=-1 x+4(2)=3
+(x+4y=3) x+8=3
y=2 -8 -8
x=-5
3.x-4y=18 x-4(-2)=18
-(x-3y=4) x+8=18
7y=-14 -8 -8
y=-2 x=10
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