-7t+2-7t=-40

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Solution for -7t+2-7t=-40 equation: 


t in (-oo:+oo)

2-7*t-(7*t) = -40 // + 40

2-7*t-(7*t)+40 = 0

2-7*t-7*t+40 = 0

42-14*t = 0 // - 42

-14*t = -42 // : -14

t = -42/(-14)

t = 3

t = 3

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