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Solving Systems of Linear Equations by Substitution

Mathematics
Tutor: None Selected Time limit: 0 Hours

  1. Solve and verify each of the following systems of linear equations.

     

    /3              a.   5x – 2y =- 6 and 2x y = 1

     

    Answer:

     

    /3              b.   2x + 3y = 432 and 5x – 2y = 16

     

    Answer:

Apr 23rd, 2015

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Apr 23rd, 2015

 5x – 2y =- 6
 2x y = 1

To eliminate y, multiply  eq.2 by 2 
 5x – 2y =- 6
4x 2y = 2

Subtract  equation 4 from 3,

x = -8

So y = (2 *-8) -1 = -16 -1

  = -17

Please verify if the second question is correct.

Apr 24th, 2015

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Apr 23rd, 2015
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Apr 23rd, 2015
Feb 24th, 2017
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