3x+20+1/2(4x-1)=-1/2

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Solution for 3x+20+1/2(4x-1)=-1/2 equation: 


x in (-oo:+oo)

(1/2)*(4*x-1)+3*x+20 = -1/2 // + -1/2

(1/2)*(4*x-1)+3*x-(-1/2)+20 = 0

(1/2)*(4*x-1)+3*x+1/2+20 = 0

1/2*(4*x-1)+3*x+1/2+20 = 0

(1/2*2*(4*x-1))/2+(2*3*x)/2+1/2+(2*20)/2 = 0

1/2*2*(4*x-1)+2*3*x+2*20+1 = 0

10*x-1+1+40 = 0

10*x+40 = 0

(10*x+40)/2 = 0

(10*x+40)/2 = 0 // * 2

10*x+40 = 0

10*x+40 = 0 // - 40

10*x = -40 // : 10

x = -40/10

x = -4

x = -4

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