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  • 21-02-2021
  • Mathematics
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bsoyferman2030 bsoyferman2030
  • 21-02-2021

Answer:

The answer is 3x+12

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gaihrenisha gaihrenisha
  • 21-02-2021

Step-by-step explanation:

Perimeter means the sum of all the three side of triangle perimeter= x + x+ 5 + x +7 =3x +12

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