Linear Equations

Solve using the elimination method. If the system has no solution or an infinite number of solutions, state this.
-2x - 8y = 22
-6x - y = 20

1. 👍 0
2. 👎 0
3. 👁 47
1. -2x - 8y = 22 ...(1)
-6x - y = 20 ...(2)

(2)-3(1)
23y = -46
y = -2 ...(3)

substitute (3) in(2)
-6x +2 = 20
x=-3 ...(4)

substitute (3) and (4) in (1)
6 + 16 =22 = RHS

So
x=-3, y=-2

1. 👍 0
2. 👎 0

Similar Questions

1. math

solve using the elimination method. If the system has no solution or infinite number of solutions a state this 4x-6y=30 3x-5y=24

asked by nicholas on February 16, 2011
2. Linear Equations

Solve using the elimination method. If the system has no solution or an infinite number of solutions, state this. 10x - y = 12.5 3x + y = 7

asked by Wayne on May 24, 2011
3. Algebra

Solve using the elimination method.Show work.If the system has no solution or an infinite number of solution state ths...-5x+4y=-16,-15x+2y=-58

asked by sherry on March 22, 2012
4. algebra

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 2x-6y=2 -8x+6y=-26

asked by Ann on July 3, 2012
5. math

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. x + y = 10 x – y = 2

asked by Shirley on February 2, 2012
6. algebra

Solve using the elimination method. Show your work. If the system has not solution or an infinite number of solutions, state this. -2x-8y=-42 -4x+6y=-18

asked by Ann on July 3, 2012
7. intermediate algebra

Solve using the elimination method. Show all work. If the system has no solution or an infinite number of solutions, state this. 3x+7y=77 -2x+7y=42

asked by ROCKY on July 30, 2011
8. intermediate algebra

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions,state this. 3x+7y=77 -2x+7y=42

asked by ROCKY on August 1, 2011
9. algebra

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. -8x – 2y = -28 -3x + 5y = 47

asked by Anonymous on March 4, 2012
10. algebra

solve using the elimination method. show your work. if the system has no solution or an infinite number of solutions, state this x+y=10 x-y=2

asked by Anonymous on June 30, 2011

More Similar Questions