10
by subtracting 2 on both sides
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2x +n5y=12
2x+10=12 2x=2 x=1
2x + 6x + 4x = 12x
2x2 + 11x + 12 = 2x2 + 3x + 8x + 12 = x*(2x + 3) + 4*(2x + 3) = (2x + 3)*(x + 4)
-2x + 6 <= 4x + 18 -2x <= 4x + 12 -12 <= 6x -2 <= x