Check the picture below.
[tex]\bf \stackrel{M}{(4x-3)}+\stackrel{N}{(9x-6)}+\stackrel{P}{(6x-1)}=180\implies 19x-10=180 \\\\\\ 19x=190\implies x=\cfrac{190}{19}\implies \boxed{x=10} \\\\[-0.35em] ~\dotfill\\\\ 4(10)-3\implies \stackrel{M}{37}~\hfill 9(10)-6\implies \stackrel{N}{84}~\hfill 6(10)-1\implies \stackrel{P}{59}[/tex]
