scissorsformyhands
scissorsformyhands scissorsformyhands
  • 20-04-2021
  • Mathematics
contestada

Mhanifa please help im almost done :)

Mhanifa please help im almost done class=

Respuesta :

mhanifa
mhanifa mhanifa
  • 20-04-2021

Answer:

19)

  • 9/4 = (r - 10)/r
  • 9r = 4(r - 10)
  • 9r = 4r - 40
  • 5r = -40
  • r = -8

20)

  • (x + 6)/x = 10/7
  • 10x = 7(x + 6)
  • 10x = 7x + 42
  • 3x = 42
  • x = 14

21)

  • (n - 9)/(n + 5) = 7/4
  • 7(n + 5) = 4(n - 9)
  • 7n + 35 = 4n - 36
  • 3n = -71
  • n = -71/3

22)

  • 6/(b + 9) = 4/(b + 5)
  • 6(b + 5) = 4(b + 9)
  • 6b + 30 = 4b + 36
  • 2b = 6
  • b = 3

23)

  • 8/3 = (v - 9)/(7v + 4)
  • 8(7v + 4) = 3(v - 9)
  • 56v + 32 = 3v - 27
  • 53v = - 59
  • v = -59/53

24)

  • 8/(5x - 4) = 6/(x + 5)
  • 8(x + 5) = 6(5x - 4)
  • 8x + 40 = 30x - 24
  • 22x = 64
  • x = 64/22
  • x = 32/11
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