(a-25) x 100 / a = 30 Solve for a

Given equation: (a - 25) x 100/a = 30
By cross multiplication,
(a - 25) x 100 = 30a
By distributive property,
100a - 25 x 100 = 30a
100a - 2500 = 30a
100a - 30a = 2500
(100 - 30)a = 2500
70a = 2500
a = 2500/70
a = 250/7
So, we got the value of a as 250/7. We can even verify...