Pl help

what is this?: divide m by the sum of 5 and 2

Let m be the unknown number:
The product of 5 and the sum of two and the number: 5*(2+m)
is five times the number = 5m

5(2+m) = 5m

Divide both sides by 5:

2 + m= m

Subtract m from both sides:

2 = 0
When you get a nonsense result like 2=0, it means that there is no solution to the equation; that is, there is no number that equals itself plus 2 (2+m=m)