Solve the following equations.

Given:

We first put x = 0 in the expression and obtain:

⇒ 63/12 = 3/(-5) which does not hold true.

∴ x=0 is not a solution.

Now, let ……………… (1)

Multiply numerator and denominator of second expression by 5x:

……………….(2)

∴ From equation (1) and (2), we get:

Cross multiply and obtain:

8x + 12 = 21x – 105

⇒ 21x – 8x = 12 + 105

⇒13x = 107

⇒ x = 9

∴ x=2 is the solution.