Answer :

valex20

[tex]3(2x + 17x + 63) \div (8 + x) \\ 6x + 51 + 189 \div 8x[/tex]
[tex]6x \times 8x = 48x[/tex]
[tex]51 + 189 \div 48x \\ 240 \div 48x \\ 5x[/tex]
= 5x