1-1/2*t=20

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Solution for 1-1/2*t=20 equation: 


t in (-oo:+oo)

1-((1/2)*t) = 20 // - 20

1-((1/2)*t)-20 = 0

(-1/2)*t-20+1 = 0

-1/2*t-19 = 0 // + 19

-1/2*t = 19 // : -1/2

t = 19/(-1/2)

t = -38

t = -38

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