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
it equals -4n
4n + 3 = 15 4n +3 - 3 = 15 - 3 4n = 12 4n/4 = 12/4 n = 3
It is a linear equation in one unknown variable, n. Its solution is n = 1
3n + 4n = 42 7n = 42 n = 42/7 n = 6
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
7n + 2 = 4n + 17Subtract 2 from each side:7n = 4n + 15Subtract 4n from each side:3n = 15Divide each side by 3:n = 5
3n + 2n = 7 + 4n 5n = 7 + 4n 5n - 4n = 7 n = 7
for n=4: (4 x 5) + 4 = 24
it equals -4n
y
4n+13=1 -13 -134n=-12/4 /4n=-3
3 + 3n = 9 + 2n + 4n n = -2
Move the 2n over the equals sign. Become 4n (as 6n-2n= 4n) and then if 4n=16 then n=4.
1
4n + 3 = 31n 3 = 27n n = 3/27
5n-2+2=4n 5n=4n n=0