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(1/3)*x+(4/5)*y+(1/2)*z+1/5 = 0
1/3*x+4/5*y+1/2*z+1/5 = 0 // - 4/5*y+1/2*z+1/5
1/3*x = -(4/5*y+1/2*z+1/5) // : 1/3
x = (-(4/5*y+1/2*z+1/5))/1/3
x = -3*(4/5*y+1/2*z+1/5)
x = -3*(4/5*y+1/2*z+1/5)
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