maths-algebra

solve these similtanious equations using an algebraic method
4x+3y=21
2x+y=8

you must show your working


multiply the second equation by two..

4x + 2y=16

Now subtract that equation from the first.

  1. 👍 0
  2. 👎 0
  3. 👁 95
asked by paris

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math - Algebra

    A. Solve the following quadratic equations. Make sure to show all your work. Do not use any method (e.g. factoring, completing the square, quadratic formula, graphing) more than twice. Use the graphing method at least once. 1.

    asked by Angela Again! on January 9, 2007
  2. Algebra

    How do I solve for elimination method on this problem: 0.3x - 0.2y=4 and 0.3x + 0.3y= 5/19. I know that multiply by 10 on both equations and get 3x-2y=40 and 3x+3y=50/19. and then I have to multiply 3x-3y=40 by 3 and 3x+3y= 50/19

    asked by A.W. on March 6, 2009
  3. Algebra 2345678!!

    Solve the system of equations using the Addition method. 2a + 3b = -1 3a + 5b = -2 The addition method tells you to find common multiples of a coefficient, then add the equations together to eliminate a variable. If you multiply

    asked by Margie on October 14, 2006
  4. need guidance on an algebra problem

    20 x+3(y-1)=11 2(x-y)+8y = 28 multiply out 20 x+3y-3=11 - Is this correct? 2x+14y = 28 Using the addition method, would you multiply the first problem by 2 and the second by 20? No. In the second multiply out, you should have

    asked by Nikki on August 20, 2007
  5. algebra 1

    Solve the following systems of linear equations using algebraic method. 1)3y=11-2x 3x=y-11 2)8x-6y=14 12x-9y=18

    asked by Janet on October 31, 2012
  6. Math

    Write two equations that have your two integers as solutions. Show how you built the equations using your integers, numbers used 5 and 8. Solve your system of equations by the addition/subtraction method. Make sure you show the

    asked by Klint on September 28, 2011
  7. math

    How do I solve the equations using the elimination method: .3x-.2y=4 and .4x +.3y= 49/23 Normally I would multiply the decimals by 10 to make them whole numbers, but that fraction is really throwing me off. What do I multiply to

    asked by bob on March 14, 2010
  8. Math 3

    If you want to be eligible for partial credit, please show your work. Solve the following system of equations using any method. y=1/2x+3 y=1/3x-2 Try substituting the equations. if y=1/3x-2, then 1/3x-2 = 1/2x+3 Solve for x, then

    asked by Francheska on November 7, 2006
  9. math

    What would you need to multiply by in order to solve this system of equations using the linear combination (elimination) method? {6x−2y=4 7x+5y=3 Multiply the 1st equation by 3 and leave the 2nd equation alone. This will

    asked by Jay on May 28, 2017
  10. algebra 1

    Solve the following systems of linear equations using any algebraic method.If possible,check your solution. 1)2x+5y=3 X-3y=7 2) 3y=11-2x 3x=y-11 3)8x-6y=14 12x-9y=18

    asked by Janet on October 30, 2012

More Similar Questions