Question

log2-x 1/8=3

log3x15=1/2

Answer 1

log2-x 1/8=3

 

(2-x)^3=1/8

(2-x)^3=(1/2)^3

2-x=1/2   /*2

2-2x=1

-2x=1-2

-2x=-1

x=1/2

 

 

log3x15=1/2

(3x)^(1/2)=15  /podnosimy do kwadratu

3x=225  /3

x=225/3