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**Example 1: Find the x – intercept of the equation of the line 7x + 3y = 21.**

We can convert the given equation into (x/a) + (y/b) = 1

Here a is the x intercept

To convert into this form, first we can divide this equation by 21

Then we have (7x/21) + (3y/21) = 1

We can write above equation as (x/ 3) + (y/7) = 1

Here, x intercept = a = 3.

**Example 2: Find the x – intercept of the equation of the line 5x + 4y = 20.**

We can convert the given equation into (x/a) + (y/b) = 1

Here a is the x intercept

To convert into this form, first we can divide this equation by 20

Then we have (5x/20) + (4y/20) = 1

We can write above equation as (x/ 4) + (y/5) = 1

Here, x intercept = a = 4.