-1/2t+7-3t=21/2

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Solution for -1/2t+7-3t=21/2 equation: 


t in (-oo:+oo)

(-1/2)*t-(3*t)+7 = 21/2 // - 21/2

(-1/2)*t-(3*t)-(21/2)+7 = 0

(-1/2)*t-3*t-21/2+7 = 0

-7/2*t-7/2 = 0 // + 7/2

-7/2*t = 7/2 // : -7/2

t = 7/2/(-7/2)

t = -1

t = -1

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