Let
n ------> the number
so
Part 1) What number minus 12 equals 5?
the algebraic expression is equal to
n-12=5
Rewrite
n=5+12
n=17
Part 2) 5 minus 12 equals what number?
we have
5-12=n
n=-7
Part 3) What number plus 5 equals 12?
we have
n+5=12
n=12-5
n=7
Part 4) n-5=12
the question is -----> What number minus 5 equals 12?
Part 5) 12 minus what number equal 5?
the equation is
12-n=5
n=12-5
n=7