2^1-х =8 2^3-х =16 2^4-2х = 64 3^х-18= 1/9 2^4х-19= 1/8 (1/2)^4х-14=1/64

1.)2^1-x=8
-2-x=8
-x=10
x=-10
2.)2^4-2x=64
16-2x=64
-2x=48
x=24
3.)3^x-18=1/9
3^x=18/1+1/9=18/9=2
3^x=2