[tex]\sf 6+ \frac{8}{10} x= \frac{9}{10} x[/tex]
Subtract [tex]\frac{8}{10} x[/tex] from both sides
[tex]\sf 6+ \frac{8}{10} x - \frac{8}{10} x= \frac{9}{10} x- \frac{8}{10} x[/tex]
Simplify:
[tex]\sf 6 = \frac{1}{10}x[/tex]
Multiply 10 on both sides:
[tex]\sf 6 \times 10= \frac{1}{10}x \times 10[/tex]
Simplify
[tex]\sf 60= x [/tex]
So your answer is x=60. :)
