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Y = 250*(1/9)*x-3 // - 250*(1/9)*x-3
Y-(250*(1/9)*x)+3 = 0
Y+(-250/9)*x+3 = 0
Y-250/9*x+3 = 0 // - Y+3
-250/9*x = -(Y+3) // : -250/9
x = (-(Y+3))/(-250/9)
x = 9/250*(Y+3)
x = 9/250*(Y+3)
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