What is the value of a in the equation 3a + b = 54, when b = 9?

Solution:

Given: 3a + b = 54 ………(1)

b = 9

Substitute b=9 in (1)

3a + 9 =54

Let us solve this equation by isolating the variable.

3a =54-9

3a = 45

a= 15

What is the value of a in the equation 3a + b = 54, when b = 9?

Summary:

The value of a in the equation 3a + b = 54, when b=9 is 15.