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(2/5)*x-((20/5)*x) = 30/5-(1/5) // - 30/5-(1/5)
(2/5)*x-((20/5)*x)-(30/5)+1/5 = 0
(2/5)*x-4*x+1/5-6 = 0
-18/5*x-29/5 = 0 // + 29/5
-18/5*x = 29/5 // : -18/5
x = 29/5/(-18/5)
x = -29/18
x = -29/18
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