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1 Daca 2a+3b/ a+7a =5/6, aflati a/b.
2 Daca a+5b/ 4a+b = 7/4 aflati a/b.
3 Daca 3x+y/ 2x+y= 8/3 aflati x/y.
4 Daca 7x+3y/ 4x+5y = 3/2 aflati x/y.
5 Daca 3x-5y/ 2x-5y = 7/4, 2x ≠ 5y, aflati x/y.

va rog foarte frumos am nevoie de ajutor