1/2y-(y+2/5)=1/40(y+4)

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Solution for 1/2y-(y+2/5)=1/40(y+4) equation: 


y in (-oo:+oo)

(1/2)*y-y-(2/5) = (1/40)*(y+4) // - (1/40)*(y+4)

(1/2)*y-((1/40)*(y+4))-y-(2/5) = 0

(-1/40)*(y+4)+(1/2)*y-y-2/5 = 0

y/2-1/40*(y+4)-y-2/5 = 0

(-1/40*2*5*(y+4))/(2*5)+(5*y)/(2*5)+(2*5*(-y))/(2*5)+(-2*2)/(2*5) = 0

5*y-1/40*2*5*(y+4)+2*5*(-y)-2*2 = 0

19/4*y-10*y-4-1 = 0

-21/4*y-4-1 = 0

-21/4*y-5 = 0

(-21/4*y-5)/(2*5) = 0

(-21/4*y-5)/(2*5) = 0 // * 2*5

-21/4*y-5 = 0

-21/4*y-5 = 0 // + 5

-21/4*y = 5 // : -21/4

y = 5/(-21/4)

y = -20/21

y = -20/21

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