2х -3у = 1 х/у=0,75

[latex] left { {{2x-3y=1} atop { frac{x}{y} =0,75}} ight. \ left { {{2x-3y=1} atop {x=0,75y}} ight. \ left { {{2*0,75-3y=1} atop {x=0,75y}} ight. \ 1,5-3y=1 \ -3y=1-1,5 \ -3y=-0,5 \ y=6 \ left { {{y=6} atop {x=0,75*6 }} ight. \ left { {{y=6} atop {x=4,5}} ight. [/latex]