Question 1049767
the equations are

{{{(2010)/(3)}}}={{{u-v}}}
{{{(5450)/(5)}}}={{{u+v}}}
where {{{(u)}}} and {{{v}}} are the speeds rates of the plane in still/calm air and wind respectively.

{{{(670)}}}={{{u-v}}}
{{{(1090)}}}={{{u+v}}}
*[invoke linear "u", "v", 1, -1, 670, 1, 1, 1090 ]