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3(6-y) - y = 6 x = 6 - 4
18 - 3y = 6 x = 2
-3y = 6 - 18
y = -12/-3
y = 4
3x - y = 6
3(6-y) - y = 6
18 - 6y - y = 6
-7y = -12
y = 12/7
x = 6 - 12/7
x = 42/7 - 12/7
x = 32/7
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