Va rog ajutați-mă, urgent

( x; y ) d.p ( 3; 4 )
x / 3 = y / 4 = k ==> x = 3 k; y = 4 k
( 3 x + 2 y ) / ( 2 x + 3 y ) = 17 / 18
= ( 3 · 3 k + 2 · 4 k ) / ( 2 · 3 k + 3 · 4 k )
= ( 9 k + 8 k ) / ( 6 k + 12 k ) =
= 17 k / 18 k =
= 17 / 18