Explicație pas cu pas:
a)
[tex]1,5+3=a \\ a = 4,5[/tex]
b)
[tex] \frac{ \frac{2}{3} }{2} - 1 = a < = > \frac{2}{6} - 1 = a \\ \frac{2 - 6}{6} = a < = > - \frac{4}{6} = a \\ = > a = - \frac{2}{3} [/tex]
c)
[tex] \frac{2 \times \frac{3}{5} }{3} - \frac{1}{2} = a \\ \frac{6}{15} - \frac{1}{2} = a \\ \frac{12 - 15}{30} = a \\ - \frac{3}{10} = a = > a = - \frac{3}{10} [/tex]
d)
[tex]0,2 \times \frac{10}{3} - \frac{1}{5} = \frac{2a}{3} \\ \frac{2}{3} - \frac{1}{5} = \frac{2a}{3} < = > 10 - 3 = 10a \\ = > a = \frac{7}{10} [/tex]
