84=6t+7t-7

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Solution for 84=6t+7t-7 equation: 


t in (-oo:+oo)

84 = 6*t+7*t-7 // - 6*t+7*t-7

7-(6*t)-(7*t)+84 = 0

7-6*t-7*t+84 = 0

91-13*t = 0 // - 91

-13*t = -91 // : -13

t = -91/(-13)

t = 7

t = 7

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