[tex]2r - 3,1 = 1,7
[/tex]
Keep the numbers with incognito on the left and the numbers without incognito on the right. Exchanging the signs when changing sides if applicable.
[tex]2r = 1,7 + 3,1[/tex]
[tex]2r = 4,8[/tex]
[tex]r = \frac{4,8}{2} [/tex]
[tex]\boxed{r = 2,4}[/tex]
--------------------------------
[tex]4t + 3,5 = 12,5[/tex]
Keep the numbers with incognito on the left and the numbers without incognito on the right. Exchanging the signs when changing sides if applicable.
[tex]4t = 12,5-3,5[/tex]
[tex]4t = 9,0[/tex]
[tex]t = \frac{9,0}{4}[/tex]
[tex]\boxed{t = 2,25}[/tex]
-------------------------------------
[tex]8m - 5.5 = 10.1[/tex]
Keep the numbers with incognito on the left and the numbers without incognito on the right. Exchanging the signs when changing sides if applicable.
[tex]8m = 10,1 + 5,5[/tex]
[tex]8m = 15,6[/tex]
[tex]m = \frac{15,6}{8}[/tex]
[tex]\boxed{m = 1,95}[/tex]
