2a - numar prim
a- este cifra => a∈ {0,1,2...,9}
dar 2a ≤ 25 => a = 3 , 2a = 23 ( 23 numar prim mai mic decat 25)
[tex] \dfrac{3}{46} = \dfrac{x}{23} [/tex]
[tex]x\cdot46 = 3 \cdot23[/tex]
[tex]46x = 69[/tex]
[tex]x = \dfrac{69}{46}[/tex]
[tex]x = \dfrac{ \not 69}{ \not46}[/tex]
[tex]\boxed{x = \dfrac{3}{2}}[/tex]
