-7+t+t=-19

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Solution for -7+t+t=-19 equation: 


t in (-oo:+oo)

t+t-7 = -19 // + 19

t+t-7+19 = 0

2*t+12 = 0 // - 12

2*t = -12 // : 2

t = -12/2

t = -6

t = -6

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