Write the operations out in words.
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n = 1 7n + 6n - 5 = 4n + 4 13n - 5 = 4n + 4 13n - 4n - 5 = 4n - 4n + 4 9n - 5 = 4 9n -5 + 5 = 4 + 5 9n = 9 n = 1
3n + 4n = 42 7n = 42 n = 42/7 n = 6
The expression could be: 2 -7n
9n-2=7n+50 7n+9n=50+2 16n=52 n= 3.25
It is a linear equation in one unknown variable, n. Its solution is n = 1