haleybrooks haleybrooks
  • 22-08-2018
  • Mathematics
contestada

how do i work out 3(d-4)=9

Respuesta :

Shinrinyoku
Shinrinyoku Shinrinyoku
  • 23-08-2018
3(dāˆ’4) = 9

begin by distributing
(3)(d)+(3)(āˆ’4) =9

solve right side
3d + -12 = 9

add 12 to both sides
3d = 21

divide both sides by 3
d = 7
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