exponential functions

[night lynx]

Title

[grand flare]

Use exponential rules to split that 2^(x+1) to start

[storm slate]

2^(x - 2) = 2^x/2^2 = (1/4)(2^x)
let y = 2^x
(1/4)y + y - 640 = 0
(5/4)y = 640
y = (4/5)(640)
y = 512
2^x = 512
x = 9

[night lynx]

Thx