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  • 21-09-2020
  • Mathematics
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mlarsen5000
mlarsen5000 mlarsen5000
  • 21-09-2020

Answer:

D) n=13

Step-by-step explanation:

n+n+7+2n-12+3n+4=90

7n-1=90

7n=90+1

7n=91

n=91/7

n=13

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