Question

Now answer this one.............
.

Answer 1

make two lines parallel

multiply 1 st eq by 4/5

so 4m/5 = n( by comparing)

4m= 5n

m= 5n/4

as m and n are integers

so 5n should be multiple of 4

20,40...

n = 4

m = 5

so m+n = 9