Respuesta :
Answer: 15
Step-by-step explanation: 5n + 10=10n - 65
-10n -10n
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-5n +10 = -65
-10 -10
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-5n = -75
divide -5 on both sides and you should get positive 15
Subtract 5n from 10n which gives you 10=5n-65 and then add 65 to 10 so now 75=5n then divide 75 by 5 which gives you 15. What you do to one side you have to do to be other