x/12 + y/8 = 1 /*24
x-2/4 - y-6/2 = 2 /*4
2x + 3y = 24
x - 2 - 2(y - 6) = 8
x - 2 - 2y + 12 = 8
x - 2y = - 2 /*(-2)
-2x + 4y = 4
-------------------
7y = 28
y = 4
2x + 3 * 4 = 24
2x + 12 = 24
2x = 24 - 12
2x = 12
x = 6
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x/12 + y/8 = 1 /*24
x-2/4 - y-6/2 = 2 /*4
2x + 3y = 24
x - 2 - 2(y - 6) = 8
2x + 3y = 24
x - 2 - 2y + 12 = 8
2x + 3y = 24
x - 2y = - 2 /*(-2)
2x + 3y = 24
-2x + 4y = 4
-------------------
7y = 28
y = 4
2x + 3y = 24
2x + 3 * 4 = 24
2x + 12 = 24
2x = 24 - 12
2x = 12
x = 6
x = 6
y = 4
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