Question

16 x 7 = 28 x n
and
39 x 5 = n x 15.

Answer 1

Explanation:

16×7=28×n

or,16×7/28=n

or,112/28=n

or,n= 4

Again

39×5=n×15

or,39×5/15=n

or,195/15=n

or,n=13

Answer 2

Explanation:

the first one is 4 and the second one is 11.6