Answer:
13(4x-13)
if you distribute it then you come back with 52x-169.
Easy:
((18-x) -5) + ((18+x)➗2)
18). 16:80 is the ratio but in simplest form is; 5:0
19). 36:54 is the ratio but in simplest form is; 2:3
20). 12:24 is the ratio but in simplest form is; 1:2
hope that helps:D
