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

asked Jan 15, 2015 23.5k views

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1 vote

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

t=-3,5 |·6
6t=-21

Hkhalifa answered Jan 16, 2015

7.4k points

3 votes

3t-7=5t
-7=2t |•3
-21=6t

Pankaj Shinde answered Jan 21, 2015

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