Answer :
We are given the equation
[tex]$$10.1 + r = 12.8.$$[/tex]
To solve for [tex]$r$[/tex], subtract [tex]$10.1$[/tex] from both sides of the equation. This gives:
[tex]$$r = 12.8 - 10.1.$$[/tex]
Performing the subtraction, we find:
[tex]$$r = 2.7.$$[/tex]
Thus, the solution is
[tex]$$r = 2.7.$$[/tex]
[tex]$$10.1 + r = 12.8.$$[/tex]
To solve for [tex]$r$[/tex], subtract [tex]$10.1$[/tex] from both sides of the equation. This gives:
[tex]$$r = 12.8 - 10.1.$$[/tex]
Performing the subtraction, we find:
[tex]$$r = 2.7.$$[/tex]
Thus, the solution is
[tex]$$r = 2.7.$$[/tex]