Show how to solve each of the following systems of linear equations by elimination or substitution, and using matrix inverses

a) 3x-y=1

-2+y=1

 

b) 3x+2y=5

-2x+3y+14
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1 Answer

line 1: 3x-y=1

line 2: y-2=1

from line 2....y=3

line 1...3x=y+1

3x=3+1=4

x=4/3
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