Răspunsuri

2014-02-05T17:35:52+02:00
5(7x+3y)=4(5x+6y)
35x+15y=20x+24y
35x+15y-20x-24y=0
15x-9y=0
3(5x-3y)=0
5x-3y=0
5x=3y si pt ecuatie x=3y supra 5 si inlocuiesti si trebuie sa iti dea 30
1 5 1
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2014-02-05T17:37:35+02:00
A) 5(7x+3y)=4(5x+6y) => 35x+15y=20x+24y=>35x-20x=24y-15y=> 15x=9y | :3 => 5x=3y
1 5 1