Question

Aflati A daca -1 supra 2 este solutie a ecuatiei (a+1)(x+3,5)=2a+x

Answer 1

înlocuiește -1 supra 2 in loc de x. si o rezolvi

Answer 2

$x = - \frac{1}{2} \\ \\ (a+1)(x+3,5)=2a+x \\ \\ (a+1)(- \frac{1}{2} + \frac{35}{10}) = 2a- \frac{1}{2} \\ \\ (a+1)( \frac{-1+7}{2}) = 2a- \frac{1}{2} \\ \\ (a+1)* \frac{6}{2}=2a- \frac{1}{2} \\ \\ 3a+3=2a- \frac{1}{2} \\ \\ 3a-2a=-3- \frac{1}{2} \\ \\ a=- \frac{7}{2}$