Seudónimo Seudónimo

07-04-2014
Mathematics

contestada

im trying to figure out how to do this 3t-7=5t,then 6t= i want to know how they get the answer -21

Respuesta :

Fastieh Fastieh

07-04-2014

3t-7=5t
-7=2t |•3
-21=6t

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januzo4819864 januzo4819864

07-04-2014

3t-7=5t
3t-5t=7
-2t=7 |·(-1)
2t=-7 |:2
t=-3,5

t=-3,5 |·6
6t=-21

Answer Link

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