Question

Solving system of linear equations by using the apropiate method name the method and the x,y coordinates

1)X=4y+8
2x-8y=-3
2)3x-7y=6 elimination method
2x+7y=4 (2,0)
3)5x-2y=12 elimination method
3x-2y=-2 (7,23/2)
4)9x-8y=42 elimination method
4x+8y=-16 (2,-3)
5)X=4y+8 substitution method
2x-8y=-3 (3,1)

Answer 1

#2 elimination
3x-7y=6
+2x+7y=4
________
5x =10
x =2

if x is 2, you plug it in
2(2)+7y=4
7y=4-4
y=0
(2,0)

Answer 2

Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this.
4x + 4y = -36
4x + 4y = 12

Answer 3

X=4y+8

Answer 4

x-4y=-3
2x+8y=-9