2n+2n equals 4n
Nonsense.
2n plus 7 equals 19 2n equals 12 n equals 6
2n-9=-4
4n - 2n = 84 2n = 84 n = 42
2n + 19 = -7 2n = -7 - 19 2n = -26 n= -13
Move the 2n over the equals sign. Become 4n (as 6n-2n= 4n) and then if 4n=16 then n=4.
2n x 2n x 2n = 8n^3
5-2n=3 -2n=3-5 -2n=-2 n=1
if you mean 2n=8, then N=4, which translate to 2x4=8
Cosec x = -2 => sin x = -0.5 The primary solution is x = -pi/6 radians. Therefore the solutions are: 2n*pi - pi/6 and (2n+1)*pi + pi/6 for all integer n.
x = (2n+1)*pi/2 radians for any integer n.