3/4(r/2)=5/4(100-r/4)

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Solution for 3/4(r/2)=5/4(100-r/4) equation: 


r in (-oo:+oo)

(3/4)*(r/2) = (5/4)*(100-(r/4)) // - (5/4)*(100-(r/4))

(3/4)*(r/2)-((5/4)*(100-(r/4))) = 0

(-5/4)*(100-(r/4))+(3/4)*(r/2) = 0

(3*r)/8-5/4*(100-1/4*r) = 0

(-5/4*8*(100-1/4*r))/8+(3*r)/8 = 0

3*r-5/4*8*(100-1/4*r) = 0

11/2*r-1000 = 0

(11/2*r-1000)/8 = 0

(11/2*r-1000)/8 = 0 // * 8

11/2*r-1000 = 0

11/2*r-1000 = 0 // + 1000

11/2*r = 1000 // : 11/2

r = 1000/11/2

r = 2000/11

r = 2000/11

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