Question

Помогите решить , (439-у*14)+39=500

Answer 1

(439-у*14)+39=500
439-у*14=500-39
439-у*14=461
439-461=у*14
-22=у*14
у=-11/7=-1 4/7

Answer 2

499-14y+39=500=>-14y=500-39-439=>y=-11/7