How do you solve #m/2-7>4#?
Add 7 to both sides.
Multiply both sides by 2.
You treat this like a normal equation. There is one 'trap' however. If the whole thing is multiplied by a negative number the inequality is turned round the other way.
For example: It is true that
Now consider the incorrect calculation of:
Add 7 to both sides giving
Multiply both sides by 2 giving