n+3=12
n=9
Please indicate subject rather than grade level.
Subtract 3 from both sides of the equation to get your answer.
I hope this helps a little more. Thanks for asking.
n+3=12
n=(4)
4x3=12..... simple :)
n+3=12
12
- 3
_____
9 n+3=12
CHECK IT! 9+3=12
9 n=9
+3
___
12 TADA!!!
n+3=12
transposing (-3)to r.h.s
n=12-3
n=9