Substitution Basics
Substitution
Elimination
Basics
Elimination
100
3u + z = 15
u = 4
(4,2)
100
y = 6x - 11
-2x - 3y = -7
1 = 6(2) - 11 -2(1) - 3(2) = -7 (2,1) (x,y)
100
-4x-2y=-12
4x+8y=-24
(6,-6)
100
8x + y = -16
-3x + y = -5
x= -1 y=-8
200
y = 6x - 11
y = 7
(3,7)
200
2x - 3y = -1
y = x -1
(4,3)
200
4x + 8y = 20
-4x + 2y = -30
x=7 y= -1
200
7x + 2y = 24
8x + 2y = 30
x = 6 y = -9
300
4x - 3y = 18 x = 6
(6,2)
300
y = -3x + 5
5x - 4y = -3
(1,2)
300
-6x + 5y = 1
6x + 4y = -10
x=-1 y= -1
300
5x + y = 9
10x - 7y = -18
x = 1 y = 4
400
y = 5x - 7 y = 28
(7,28)
400
-3x - 3y = 3
y = -5x - 17
(-4,3)
400
-3x - 4y = 2
3x + 3y = -3
x= -2 y= 1
400
-4x + 9y = 9
x - 3y = -6
x=9 y=5
500
-5x + y = -3 x = -5
(-5,22)
500
y = -2
4x - 3y = 18
(-2,3)
500
-6x + 6y = 6
-6x + 3y = -12
x=5 y=6
500
-7x + y = -19
-2x + 3y = -19
x = 2 y = -5
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