SetLeftSide
Constraint::SetLeftSide(double coeff1, Variable* var1)
Constraint::SetLeftSide(double coeff1, Variable* var1,
Constraint::SetLeftSide(double coeff1, Variable* var1,
Constraint::SetLeftSide(double coeff1, Variable* var1,
Constraint::SetLeftSide(SummandList* summands, bool deleteOldSummands)