Answer:

Step-by-step explanation:
Consider the given differential equation is



Taking all variables on right sides.


Let as assume,
and 
Find partial derivatives
and 
and 
Since
, therefore the given differential equation is exact.
The solution of the exact differential equation is






Answer:
a=d-c/b
Subtract c from both sides
a=d-c/b
divide both sides by b
Answer:
he bought the t shirt for rs 1880
Number 1 is twenty and number two is fifty six
2x divided by -24 and -3y divided by -24 then find ur X and Y