Question

lg(x+14)-(x+5)=1
срочно!!!!

Answer 1

lg((x+14)/(x+5))=lg10
(x+14)/(x+5)=10
x+14=10x+50
-9x=36
x=-4

Answer 2

lg(x+14)-lg(x+5)=1
x>-14
x>-5
(x+14)/(x+5)=10
x+14=10x+50
-9x=36
x=-4
lg 10 - lg1=1-0=1