The value of n is 3, by the commutative property.
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n + 7 = 10subtract 7 from both sidesn = 3
n= -2
2+n-3 = 6 n = 6+3-2 n= 7
3n+3=n+7 3n+3-n=n+7-n (subtract n from both sides) 2n+3=7 2n+3-3=7-3 (subtract 3 from both sides ) 2n=4 2n/2=4/2 (divided by 2 on both the sides) n=2 Answer: n=2
3n+1=7 3*2+1=7