Addition
2x + 3y = -12
-4x - 3y = 30
(-9,2)
-3x + 5y = -18
4x + 5y = -11
(1,-3)
-2x + 3y = 9
4x - 4y = -4
(6,7)
5x + 2y = 4
-4x + 3y = 6
(0,2)
What requirements are necessary to eliminate?
Same Value
Different sign
3x + 4y = 16
-5x - 4y = -16
(0,4)
-3x + 5y = -8
x + 5y = -24
(-4,-4)
2x + y = 21
4x - 3y = 7
(7,7)
x + 4y = 9
-2x + 3y = -18
(9,0)
What are the types of solutions you can have with systems of equations?
Infinite, None, One
-x + y = -1
x + y = -3
(-1,-2)
5x + 4y = 20
5x + y = 20
(4,0)
x + 2y = 2
2x - 3y = 4
(2,0)
x + y = 1
4x - 5y = 4
(1,0)
Describe how infinite solutions look when solving with ELIMINATION.
0 = 0
An equation that is true appears.
-x - y = -10
2x + y = 18
(8,2)
3x + 5y = 9
3x + y = -15
(-7,6)
x + 4y = 10
3x - 4y = 30
(10,0)
4x - y = -24
5x + 3y = 4
(-4, 8)
Describe how no solutions look when solving with Elimination.
" 0 = # "
An equation that is false occurs.
-5x + 5y = 20
-5y + 2x = -38
(6,10)
-2x + y = -8
3y + -2x = -24
(0,-8)
5y - x = 35
3x + 5y = 75
(10,9)
5y - x = 25
4x - 5y = -10
(5,6)
i walked in a phone store and got 2 iPhone and 1 android for $550 and my mom got 1 iPhone and 1 android for $350. How much does a iPhone cost and how much does a android cost?
($200 for an Iphone ,$150 for an Android)