Gather like terms. The - 2 and 4; the 7n and 3n.
7n - 2 + 3n + 4
= 10n + 2
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7n - 2 + 3n + 4 = 7n + 3n - 2 + 4 = 10n + 2 which can be simplified to 2(5n +1)
All you do is look for like terms such as 7n and 3n; 2 and 8 Then you do 7n+3n=10 n And ........... 2-8=-6 The answer is 10n-6 if you still dont get it contact me(:
3n+2+3n+2=6n+4
It is: 3n-21+4n+8 = 7n-13 simplified
n2-3n+2