[tex]8+6(4+ \frac{27}{9u} )=49+1[/tex]
[tex]6(4+ \frac{27}{9u} )=50-8[/tex]
[tex]6(4+ \frac{27}{9u} )=42[/tex]
[tex]4+ \frac{27}{9u} = \frac{42}{6} [/tex]
[tex]4+ \frac{27}{9u} = 7[/tex]
[tex]\frac{27}{9u} =7-4[/tex]
[tex]\frac{27}{9u} =3[/tex]
[tex]3*9u=27[/tex]
[tex]27u=27[/tex]
[tex]u= \frac{27}{27} [/tex]
[tex]u=1[/tex]