x:0,625+x:0,375=123456789
\(\Rightarrow\)x :(0,625+0,375)=123456789
\(\Rightarrow\)x:1=123456789
\(\Rightarrow\)x=123456789
x : 0,625 + x : 0,375 = 123456789
x . \(\frac{5}{8}\) + x . \(\frac{3}{8}\) = 123456789
x . \(\left(\frac{5}{8}+\frac{3}{8}\right)\) = 123456789
x . 1 = 123456789
x = 123456789
x : 0,625 + x : 0,375 = 123456789
x . 625 + x . 375 = 123456789
x . ( 625 + 375 ) =123456789
x . 1000 = 123456789
x = 123456,789
x:0,625+x:0,375=123456789
x:(0,625+0,375)=123456789
x:1=123456789
x=123456789x1
x=123456789