Two systems of equations are shown below. The first equation in System B is the original equation in system A. The second equation in System B is the sum of tha

Question

 Two systems of equations are shown below. The first equation in System B is the original equation in system A. The second equation in System B is the sum of that equation and a multiple of the second equation in System A.

A. x + 3y = 11 → x + 3y = 11
5x − y = 17 → 15x − 3y = 51
15x = 62
B. x + 3y = 11
15x = 62

Answer 1

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Answer 2

Ooops, one little error: x + 15x = 16x

 

So 16x = 62

x = 3.875

 

Now substitute into either of the original equation to determine the value of y.