Question
Asked Dec 22, 2019
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For Exercise, solve the system of equations using

a. The substitution method or the addition method 

b. Gaussian elimination 

c.Gauss-Jordan elimination 

d. The inverse of the coefficient matrix .

e. Cramer’s rule .

x =-3y-10

-3x-7y=22

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Expert Answer

Step 1

Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and specify the other subparts (up to 3) you’d like answered.

Step 2

Given: solve the system of equations using

  1. The substitution method or the addition method 
  2. Gaussian elimination 
  3. Gauss-Jordan elimination 
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...(i) x = -3y –10 ...(i) -3х - 7у %3D22

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Step 3

(a) using substitu...

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Substitute x = -3y – 10 in equation (ii) -3.x – 7y = 22 -3(-3y – 10) – 7y = 22 9y +30– 7y = 22 2y = 22 – 30 2y = -8 y =-4 Now, substitute y=-4 in equation (i) x = -3y – 10 x = -3(-4) – 10 x = 12 – 10 x =2

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Math

Algebra

Equations and In-equations

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