4+1/2y=-5

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


y in (-oo:+oo)

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

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

1/2*y+9 = 0 // - 9

1/2*y = -9 // : 1/2

y = -9/1/2

y = -18

y = -18

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