The equations conscience V and A are not symmetric with examen to h and r, i.e. the influence of h and r nous the problem are inherently different. We need to write A in terms of purely 1 variable. We use the constraint equation and choose to write h in https://freedirectory4u.com/listings12743600/non-connu-d%C3%A9tails-propos-de-seo-on-page