9t - 7 = 3t - 4
3t+6. t- 6
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1.9t-3t=-4+7
6t=3
t=3/6=1/2
2.3t-t=-6-6
2t=-12
t=-12/2=-6
6t=3
t=3/6=1/2
2.3t-t=-6-6
2t=-12
t=-12/2=-6
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