2n/3 = 4 2n = 3*4 2n = 12 n = 6 :)
-3n+5n+4 = -4 2n = -4-4 2n = -8 n = -4
n = 1
Move the 2n over the equals sign. Become 4n (as 6n-2n= 4n) and then if 4n=16 then n=4.
25 - 4(4) = 25 - 16 = 9.
2n-9=-4
2n/3 = 4 2n = 3*4 2n = 12 n = 6 :)
n=4
Suppose the number is N. Then 2N - 4 = 47 2N = 51 N = 25.5
-3n+5n+4 = -4 2n = -4-4 2n = -8 n = -4
n = 1
2n plus 7 equals 19 2n equals 12 n equals 6
Move the 2n over the equals sign. Become 4n (as 6n-2n= 4n) and then if 4n=16 then n=4.
25 - 4(4) = 25 - 16 = 9.
1 + 2 + 4 + ... + 2n = 2n+1 - 1
6n -3=2n+9 6n-2n=9+3 4n=12 n=12/4 n=3
Watch carefully:2N = 8Divide each side of the equation by 2:N = 4