Question

Solve by the linear combination method (with or without multiplication).

2x + 8y = –2
5x + 6y = 9










A.

(3, –1)








B.

(–2, 2)








C.

(–2, 7)








D.

(–1, 3)

Answer 1

@DSS

Answer 2

@robtobey @Compassionate @campbell_st

Answer 3

lil help

Answer 4

You can use elimination. To do this you must get one variable to cancel out. Try this:

2x + 8y = –2 -5(2x+8y=-2) -10x-40y=10
5x + 6y = 9 2(5x+6y=9) 10x + 12y = 18
-28y = 28
y = -1

You now have y...substitute -1 into the equations to get x.
2x+8(-1)=-2 5x+6(-1)=9
2x - 8 = -2 5x-6=9
2x=6 5x=15
x=3 x=3 It works in both equations so (3,-1)

Answer 5

@DSS thx

Answer 6

You're welcome