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Solving Systems of Linear Equations by Substitution

4x+y=12 (1)
x-y=8(2)

4x+y=12
x-y=8
5x/5 = 20/5

X=4

4(4) =y - 12
16+y = 12
Y =4

I think this would be an example of elimination method for solving a system of equations however I am unsure how it would transfer to substitution method thus I am needing assistance. I am needing this to be illustrated if you will in substitution but am unclear on the method and how it is done so am looking for assistance.

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Solution:

I think your original elimination method solution is not right. I am going to try both methods for you.

1, elimination ...

Solution Summary

Systems of Linear Equations are solved by Substitution. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.

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