Răspuns:
a)
[tex] \frac{x}{0.25} + 1 = 2.5[/tex]
[tex] \frac{x}{0.25} = 2.5 - 1[/tex]
[tex] \frac{x}{0.25} = \frac{1.5}{1} [/tex]
[tex]x = 0.25 \times 1.5[/tex]
[tex]x = 0.375[/tex]
b)
[tex]2.7x - \frac{13.6}{2} = 2.2[/tex]
[tex]2.7x = 2.2 + 6.8[/tex]
[tex]2.7x = 9[/tex]
[tex]x = \frac{9}{2.7} [/tex]
c)
[tex] \frac{x}{0.25} + 1.5 = 3[/tex]
[tex] \frac{x}{0.25} = 3 - 1.5[/tex]
[tex] \frac{x}{0.25} = \frac{1.5}{1} [/tex]
[tex]x = 0.25 \times 1.5[/tex]
[tex]x = 0.375[/tex]
d)
are aceasi rezolvare ca b