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How do you solve the following system: $6 x + 7 y = - 9, 5 x - 7 y = 12$ $6x + 7y = -9 , 5x - 7y = 12$ ?

1 Answer

Konstantinos Michailidis

Dec 26, 2015

Add the two equations together gives you

$11 x = 3 \Rightarrow x = \frac{3}{11}$ $11x=3=>x=3/11$

hence $y = - \frac{117}{77}$ $y=-117/77$

The solution of the system is $(\frac{3}{11}, - \frac{117}{77})$ $(3/11,-117/77)$

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