Question

Solutia reala a ecuatiei:1-2x=3 este ?

Answer 1

   
[tex]\displaystyle \\ 1 - 2x = 3 \\ \\ -2x = 3-1 \\ \\ -2x = 2 \\ \\ x = \frac{2}{-2} = -\frac{2}{2} = \boxed{-1} \\ \\ \text{Verificare: } \\ \\ 1 - 2\cdot(-1) = 1+2 = 3 [/tex]