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X-4 = (2/5)*(3-(6*x)) // - (2/5)*(3-(6*x))
X-((2/5)*(3-(6*x)))-4 = 0
(-2/5)*(3-6*x)+X-4 = 0
X-2/5*(3-6*x)-4 = 0
X-2/5*(3-6*x)-4 = 0
X+12/5*x-4-6/5 = 0
X+12/5*x-26/5 = 0
X+12/5*x-26/5 = 0
X+12/5*x-26/5 = 0 // - X-26/5
12/5*x = -(X-26/5) // : 12/5
x = (-(X-26/5))/12/5
x = 5/12*(26/5-X)
x = 5/12*(26/5-X)
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