Question

2r - 3.1 =1.7 ; 4t + 3.5 =12.5 ; 8m - 5.5 =10.1 i really need help plzzzzzzz

Answer 1

`2r - 3,1 = 1,7`
Keep the numbers with incognito on the left and the numbers without incognito on the right. Exchanging the signs when changing sides if applicable.

`2r = 1,7 + 3,1`

`2r = 4,8`

`r = (4,8)/(2)`

`\boxed{r = 2,4}`


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`4t + 3,5 = 12,5`
Keep the numbers with incognito on the left and the numbers without incognito on the right. Exchanging the signs when changing sides if applicable.

`4t = 12,5-3,5`

`4t = 9,0`

`t = (9,0)/(4)`

`\boxed{t = 2,25}`
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`8m - 5.5 = 10.1`
Keep the numbers with incognito on the left and the numbers without incognito on the right. Exchanging the signs when changing sides if applicable.

`8m = 10,1 + 5,5`

`8m = 15,6`

`m = (15,6)/(8)`

`\boxed{m = 1,95}`