Question 285
this is a multi variable linear equation. the best method is to find a way to elminate one of the variables
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-3 (11x + 2y = -1  ) 
by distributing this -3 we can eliminate the y varible. this does not change the equation because we are distributing evenly by the same scalar.  the new equation would be
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-33x -6y = 3

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now take
2 (2x + 3y = 13)
for the same purposes, the new equation would be
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4x + 6y = 26

and now adding the two new equations together the y variable cancels and we get.

-29x=29
x= -1 

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then by placing x into either equation we get the y variable.