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t in (-oo:+oo)
2*t+8 = (-3/7)*t+348/35 // - (-3/7)*t+348/35
2*t-((-3/7)*t)-(348/35)+8 = 0
2*t+(3/7)*t-348/35+8 = 0
17/7*t-68/35 = 0 // + 68/35
17/7*t = 68/35 // : 17/7
t = 68/35/17/7
t = 4/5
t = 4/5
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