6n + 4 = 40
(Minus 4 on both sides)
6n = 40 - 4
6n = 36
(Divide by 6 on both sides)
n = 36/6= 6
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6n
6n+3=15 6n+3-3=15-3=12 6n = 12 n=12/6 = 2
6n - 4 - 3 = 3n + 10 + 4n -7 = 7n - 6n + 10 -17 = n
Move the 2n over the equals sign. Become 4n (as 6n-2n= 4n) and then if 4n=16 then n=4.
10n. Just count up how many ns there are.