Answer :
We start with the equation:
[tex]$$
u + 25 = 60
$$[/tex]
Since we are given that [tex]$u = 25$[/tex], we substitute [tex]$25$[/tex] for [tex]$u$[/tex] in the left-hand side of the equation:
[tex]$$
25 + 25
$$[/tex]
Now, we add the two numbers:
[tex]$$
25 + 25 = 50
$$[/tex]
Thus, the value of the left-hand side after substitution is [tex]$50$[/tex].
[tex]$$
u + 25 = 60
$$[/tex]
Since we are given that [tex]$u = 25$[/tex], we substitute [tex]$25$[/tex] for [tex]$u$[/tex] in the left-hand side of the equation:
[tex]$$
25 + 25
$$[/tex]
Now, we add the two numbers:
[tex]$$
25 + 25 = 50
$$[/tex]
Thus, the value of the left-hand side after substitution is [tex]$50$[/tex].