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floowenef

Guest

Solving Systems of Equations Using Substitution Method and Elimination

I need help with the following:

Solve the systems of equations in numbers 1 – 9 using substitution. Show your work.

1.   y = (2/3)x - 1
      y = -x + 4

2.   x + y = 0
     3x + y = -4

3.  4x + 3y = -15
     y = x + 2

4.  x + 2y = -4
     4y = 3x + 12

5.   y = 2x
     x + y = 3

6.  x = 3 - 3y
     x + 3y = -6

7.  y = -2x + 1
     y = x - 5

8.  y = (1/2)x - 3
     y = (3/2)x – 1

9.   x + y = 2
     4y = -4x + 8

anonimnystefy

Real Member

From: Harlan's World

Registered: 2011-05-23

Posts: 16,049

Re: Solving Systems of Equations Using Substitution Method and Elimination

Did you try any of thise? What did you get?

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ShivamS

Member

Registered: 2011-02-07

Posts: 3,648

Re: Solving Systems of Equations Using Substitution Method and Elimination

Just solve one of the equations for x or y and plug it in for x or y respectively in the other equation.

Agnishom

Real Member

From: Riemann Sphere

Registered: 2011-01-29

Posts: 25,002

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Re: Solving Systems of Equations Using Substitution Method and Elimination

http://www.mathisfunforum.com/viewtopic … 50#p154650

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