algebra URGENT!

posted by .

Solve the system using elimination.
2x – 2y = –8
x + 2y = –1

And this one:

Solve the system using elimination.
3x – y = 28
3x + y = 14

Pleease help me :(

  • algebra URGENT! -

    1st:
    add them
    3x = -9
    x = -3
    back into #2
    -3 + 2y = -1
    2y = 2
    y = 1

    2nd:
    add them
    6x = 42
    x = 7
    in the 2nd:
    21 + y = 14
    y = -7

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. College Algebra

    Please help! x-2y+z=7 2x+y-z=0 3x+2y-2z=-2 a. Solve the above system of equations using Gaussian Elimination or Gauss-Jordan Elimination. You must show row operations. b. Solve the above system of equations using Cramer's Rule.
  2. Math

    Please help! x-2y+z=7 2x+y-z=0 3x+2y-2z=-2 a. Solve the above system of equations using Gaussian Elimination or Gauss-Jordan Elimination. You must show row operations. b. Solve the above system of equations using Cramer's Rule.
  3. algebra

    i need help with these problems (either a solution or how to plug them into a graphing calculator): 1) Solve by substitution or elimination 4/x + 1/y + 2/z = 4 2/x + 3/y - 1/z = 1 1/x + 1/y + 1/z = 4 2)Solve the system of equations …
  4. Algebra/Elimination method

    Solve using the elimination method. If the system has no solution or an infinite number of solutions, state this. -27x - 18y = -180 9x + 6y = 60
  5. algebra 2

    Nonlinear homework... Solve the system by elimination. 1)y=x^2+2 -4x-y=10 2) Solve the system using substitution. Y=-3x^2+x-2 Y=-5x+3
  6. algebra 2

    Nonlinear systems Solve the system by elimination. y=x^2+2 -4x-y=10 Solve the system using substitution. y=-3x^2+x-2 y=-5x+3
  7. Algebra

    X-2y=-1 2x+y=4 solve each system using elimination. Tell whether the system has one solution, many solutions, or no solution.
  8. Algebra Multiple Choice

    Hello, This is the last of questions I have for my practice assignment. Again I will put what I got. Thanks for your help. 1.) Solve the system using substitution. Write answer as an ordered pair. 4x+2y=8 -5x-2=y A.) First equation …
  9. Algebra 1

    solve each system using elimination. 1.) 6x - 3y =15 7x + 14y =10 Tell whether the system has one solution, infinitely many solutions, or no solution. 1.) 9x +8y =15 9x +8y =30 2.) 5x - 3y =10 10x + 6y = 20
  10. Math

    1. Solve the system using elimination. 3x+3y=27 x-3y=-11 a. (8,1) b. (3,6) c. (6,3) d. (4,5)*** 2. Solve the system using elimination. 4x-7y=3 x-7y=-15 a. (-12/5,10/7) b. (-1,2) c. (6,3)*** d. (1,1/7) 3. Solve the system using elimination. …

More Similar Questions