math

Determine the solution of the following systems of linear equations using elimination.

2x + 3y = 7
x – 2y – 4 = 0

  1. 👍
  2. 👎
  3. 👁
  1. 2x + 3y = 7
    now double the 2nd:
    2x - 4y = 8
    subtract them:
    7y = -1
    y = -1/7
    sub into the 1st:
    2x + 3(-1/7) = 7
    2x = 52/7
    x = 26/7

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. math help pls pls

    Two systems of equations are shown below: System A 6x + y = 2 −x − y = −3 System B 2x − 3y = −10 −x − y = −3 Which of the following statements is correct about the two systems of equations? The value of x for

  2. Math

    Lesson 8: Systems of Linear and Quadratic Equations Check my work 1. Solve the system of equations. y = 2x^2 - 3 y = 3x - 1 a. no solution b. (-1/2, 5), (2, -5/2) c. (-1/2, -5/2), (2,5)*** d. (1/2, 5/2), (2, 5) 2.how many real

  3. College Algebra

    A pharmacist wants to mix two solutions to obtain 100 cc of a solution that has an 8% concentration of a certain medicine. If one solution has a 10% concentration of the medicine and the second has a 5% concentration, how much od

  4. Math

    When solving a system of equations, how do you determine which method to use? Like how can you determine when to use Elimination, Substitution or Graphing???

  1. math

    Determine whether the system of linear equations has one and only one solution, infinitely many solutions, or no solution. 3x − y = −3 6x − 2y = 8 a) one and only one solution b) infinitely many solutions c) no solution can

  2. Math

    Solve these simultaneous linear equations using elimination method : 3a = 2b + 1 and 3b = 5a - 3

  3. Algebra Linear Inequalities Help

    8. The system below has the solution of (1,3) where A, B, C, D, E, and F are all nonzero real numbers. Ax+By=C, Dx+Ey=F Which of the following systems would not have (1,3) as the solution? A- Ax+By=C & (2A-D)x+(2B+E)y=C-2F B-

  4. Grade 10 Math

    Write an equation that forms a system of equations with x + y = 4, so that the system has: a) No solution b) Infinitely many solutions c) One solution I know how to figure out if two linear systems have a solution, but I don't

  1. finite math

    Solve the system of linear equations using the Gauss-Jordan elimination method. 3x−2y+ 4z = 22 2x+y− 2z = 3 x+ 4y − 8z = −16

  2. Math

    Determine the value of k for which the system of linear equations 3x − y = 2 6x + ky = 2 has no solution. k =?

  3. linear systems

    The statement that is false is A. A system of quadratic-quadratic equations can have exactly one solution. B. A system of quadratic-quadratic equations has no solutions if the graphs do not intersect. C. It is impossible for a

  4. Finite Math

    Solve the system of linear equations, using the Gauss-Jordan elimination method. (If there is no solution, enter NO SOLUTION. If there are infinitely many solutions involving one parameter, enter the solution using t for the last

You can view more similar questions or ask a new question.