Răspuns:
echiunitar = egal cu unitatea
7/(2x-1)=>7=2x-1=>7+1=2x=>x=8:2=>x=4
[tex] \frac{7}{2x - 1} [/tex]
[tex]7 = 2x - 1[/tex]
[tex]1 + 7 = 2x[/tex]
[tex]8 = 2x[/tex]
[tex]x = 8 \div 2[/tex]
[tex]x = 4[/tex]
