Evaluate $y+5$y+5 if:
$y$y is equal to $3$3
$y$y is equal to $6$6
Find the value of $x-2$x−2 when $x=8$x=8.
Evaluate $a+b$a+b when $a=5$a=5 and $b=1.1$b=1.1
Find the value of $u+v+25$u+v+25 if $u$u is $32$32 and $v$v is $48$48.
substitute values for the variables in a mathematical formula in given form to calculate the value of the subject of the formula