Well, first you add 7 to 38, which is 45, then divide by 5, therefore n=9.
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5n+15 = 25 5n = 25-15 5n = 10 n = 2
Add 1 to both sides, so 5n is 8. So now divide both sides by 5, and so n=8/5
5n-2+2=4n 5n=4n n=0
It is an equation and the value of n is 9.1
-5n+9=-46 -5n+9-9=-46-9 -5n=-55 -5n/-5=-55/-5 n=11