Question 466755
-8x – 4y = -68 --> 2x + y = 17
x + 3y = 16 --> x = 16 - 3y
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Sub for x in the 1st eqn
2x + y = 17
2(16-3y) + y = 17
32 - 6y + y = 17
32 - 5y = 17
-5y = -15
y = 3
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Sub for y in either equation
x = 16 - 3y
x = 16 - 9
x = 7