Question

Calculati: 3x-14=Q; x ∈ Z  
                6(x+3)-2=5; x ∈ Z
                6x(9+25)=-3^{2}- 5^{2}
                                                                                             

Answer 1

1. 6x+18-2=5
   6x + 16 = 5 / -16
   6x = -11 / :6
   x = $\frac{-11}{6}$ adica ( - 11 supra 6 )
 doi . 54x + 150x = 9 - 25
         204 x = - 16 / : doua sute 4
         x = - 16 /  204  ( simplificam prin 4 ) si obtinem x = -4 / 51