Suzee123 Suzee123
  • 30-11-2018
  • Mathematics
contestada

If 18 +3 = n-7 then what is n

Respuesta :

xxxsanyeo
xxxsanyeo xxxsanyeo
  • 30-11-2018

Answer:

28

Step-by-step explanation:

18 + 3 = 21

28 - 7 = 21

Answer Link
shaunalab
shaunalab shaunalab
  • 30-11-2018
1. Simplify 18 + 3 to 21. 21 = n - 7
2. Add 7 to both sides. 21 + 7 = n
3. Simplify 21 + 7 to 28. 28 = n
4. Switch sides. n = 28
Answer Link

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