5(y-9)/4=-4y

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Solution for 5(y-9)/4=-4y equation: 


y in (-oo:+oo)

(5*(y-9))/4 = -4*y // + -4*y

(5*(y-9))/4-(-4*y) = 0

(5*(y-9))/4+4*y = 0

(5*(y-9))/4+(4*4*y)/4 = 0

5*(y-9)+4*4*y = 0

21*y-45 = 0

(21*y-45)/4 = 0

(21*y-45)/4 = 0 // * 4

21*y-45 = 0

21*y-45 = 0 // + 45

21*y = 45 // : 21

y = 45/21

y = 15/7

y = 15/7

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