Question

Solve the system using elimination.
2x+6y=-12
5x-5y =10

Answer 1

7x+1y=-2 ?!?!?!?!?!?!?!? Feels right to me.

Answer 2

?? Nothing was eliminated.

Multiply the first by 5.
Multiply the second by -2.

Add the two. x is eliminated.

Answer 3

??????

Answer 4

i'll try to explain
okay, letz get rid of the x value.
we will get rid of it by multiplying the first equation by 5 so u can get
5(2x+6y=-12)=10x+30y=-60
Second, letz multiply the second equation by -2
-2(5x-5y=10)=-10x+10y=-20
c how -10+10=0?. The x is cancelled. so u r left w/
40y=-80
y=-20.
But,we r not done yet. we need to find the x value as well so with the answer we got, plug it in the y into any equation. letz do the second equation
5x-5(40)=10
5x=200
x=45
.....did i do it right XD?

Answer 5

2x+6y=-12
5x-5y =10

Multiply the first by 5.
Multiply the second by -2.

10x+30y=-60
-10x+10y =-20

Add the two eequations.

Answer 6

well is it right XD?

Answer 7

Not quite.

40y=-80
y = -2

Answer 8

omg oops XD. im sorry i totally forgot to divide XD

Answer 9

sorry not divide, divided wrong, im sorry XD.
okay letz try the step again
Revised XD
letz plug in -2 in the y. with the second equation
5x-5y=10
5x-5(-2)=10
5x+10=10
5x=0
x=0

Answer 10

That's better.

Answer 11

hahahaha XD