calculati x din proporţiile
a.)
[tex] \frac{x - 1}{1 + \frac{1}{2} } = \frac{ \frac{7}{3} + 1 }{3 - \frac{3}{2} } [/tex]
x € Q


b.)
[tex] \frac{2x + 1}{4x + 3} = \frac{1}{3} [/tex]
x € Q \ {-3/4}​