The angles must add up to 360 degrees, so we can set the sum of the interior angles equal to 360 and solve for x.
106 + 94 + 135 + x + (x + 5) = 360
Combine like terms:
340 + 2x = 360
2x = 20
x = 10
First divide 3.5 by 2 which equals 1.75. Then do 1.75*3 which equals 5.25. So he drinks 5.25 liters in one hour.
(8, 11) is the correct solution. x = 8, y = 11
Plug it in:
11-8=3
That's correct.
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