Question 893262
Assume the problem is
{{{-2/7}}}v +{{{1/3}}} ={{{-1/2}}}
multiply by a common multiple of the denominators, 42; cancel the denominators
6(-2v) + 14 = -21 
-12v + 14 = -21
-12v = -21 - 14
-12v = -35
v = {{{(-35)/(-12)}}}
v = +{{{35/12}}}