Answer :
so the solution is 5 we'll start with that
x=5
to do reverse multiplcation, you must divide so
x=5
x/10=5/10
x/10=1/2
then the other problem
x=5
5x=25
to solvve
x/10=1/2
multiply by 10
x=5
then
5x=25
divide both sides by 5
x=5
x=5
to do reverse multiplcation, you must divide so
x=5
x/10=5/10
x/10=1/2
then the other problem
x=5
5x=25
to solvve
x/10=1/2
multiply by 10
x=5
then
5x=25
divide both sides by 5
x=5
B×3=5
3÷b=5
I beleive that these would work for the standards you have set.