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2x = y - 10
4y + 16 = y - 10
3x = -26
x = -8 2/3
x = 2y + 8
-8 2/3 = 2y + 8
-2y = 16 2/3
y = -8 1/3
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4x + y = 13
y = 13 - 4x
3x - 2y = 7
3x - 26 + 8x = 7
11x - 26 = 7
11x = 33
x = 3
4x + y = 13
12 + y = 13
y = 1