Question 1120953
p, plane speed if no wind
w, wind speed


{{{system(p+w=2835/4.5,p-w=2655/4.5)}}}

Simplify and solve the system.



Or a way to go ,
{{{2p=(2835+2655)/4.5}}}


{{{p=(2835+2655)/9}}}


{{{p=610}}}


.