Upload
charla-nicholson
View
219
Download
0
Embed Size (px)
Citation preview
Elimination!
“You can be GREAT
if you can ELIMINATE!”
Original Equation
9c+6b=54C+b=7
Elimination!
9c+6b=54-6c-6b=-42
__________3c/3=12/3
__________*C=4
C+b=7x-6
__________-6c-6b=-42
4+b=7-4 -4
__________*B=3
Substitution!
9c+6b=549c+6(7-c)=549c+42-6c=54
-42 -42__________
9c-6c=123c/3=12/3
__________*c=4
c+b=7-c -c
_________b=7-c
4+b=7-4 -4
_______*b=3
X=b (KEY)
Y=c
Graphing!
6x+9y=54-6 -6
_________9y/9=-6x+54/9_____________
Y=-2/3x+6
y+x=7-x -x
________Y=-x+7
First Line: Down 2 Right 3
(3,4) INTERSECTION POINT
Second Line: Down 1 Right 1
Conclusion!
That Claire bought 3 books and 4 CDs!
Check For Graphing!
6(x) + 9(y)= 546(3) + 9(4) = 54
18+36= 54
y+x=74+3=7
Steps For Elimination!
• Write the system so that like terms are aligned.
• ELIMINATE one of the variables and solve for the other variable.
• Substitute the value of the variables into one of the original equations and solve for the other variable.
• Write the answer from the last 2 steps as (x,y). And check to see if you’re correct.
Terms and Definitions
• “B” or “x” stands for books• “C” or “Y” stands for CDs• $54 is the total amount Claire had!• She only bought 7 items!