DJS1147
DJS1147 DJS1147
  • 15-10-2016
  • Mathematics
contestada

Please solve 21=5n-2(n-3)

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SJ2006
SJ2006 SJ2006
  • 15-10-2016

21 = 5n-2(n-3)

21 = 5n-2n+6

21-6 = 3n

n=15/3

n=5

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madhattedlady
madhattedlady madhattedlady
  • 15-10-2016
5=n because you multiply -2 times n then -3 then you add -2n with 5n then subtract 6 from both sides and finally divide by 3
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