Solve using augmented matrices y = 5 5x + 4y = 15

Mathematics
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 Solve a system of equations using augmented matrices

Jul 14th, 2015

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            y= 5 

5x + 4 y = 15


converting to augmented matrix 

[ 5           4       15 ]

[ 0           1         5]


second row is already in the converted form , and shows y=5

put this value of y in 5x + 4 y = 15

                                  5 x + 4 * 5 = 15

                                   5x = 15 - 20

                                     x = -5/5

                                     x =   -1


ANSWER IS   y =5  and x= -1..................


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Jul 14th, 2015

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