0
Anonymous
It is a linear equation in one unknown variable, n.
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6n+3=15 6n+3-3=15-3=12 6n = 12 n=12/6 = 2
6n
it equals -15
8
Move the 2n over the equals sign. Become 4n (as 6n-2n= 4n) and then if 4n=16 then n=4.