2,5 + [tex] \frac{1}{4} x = 5[/tex]
transformam 2,5 in fractie = [tex] \frac{25}{10}[/tex]
[tex]\frac{25}{10} + \frac{x}{4} = 5[/tex] aducem la numitor comun 20
[tex]\frac{50}{20} + \frac{5x}{20} = \frac{100}{20} [/tex] scapam de numitor
50 + 5x = 100
5x = 100 -50
5x = 50
x= 50: 5
x= 10