1/2*3x-1*x+9*x=20

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Solution for 1/2*3x-1*x+9*x=20 equation: 


x in (-oo:+oo)

3*(1/2)*x-(1*x)+9*x = 20 // - 20

3*(1/2)*x-(1*x)+9*x-20 = 0

3*(1/2)*x-x+9*x-20 = 0

19/2*x-20 = 0 // + 20

19/2*x = 20 // : 19/2

x = 20/19/2

x = 40/19

x = 40/19

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