Question

What is the value of a in the equation 5 a minus 10 b equals 45, when b equals 3?

Answer 1

15

Explanation:

5a-10b=45

5a-10.3=45

5a=75

a=15

Answer 2

a=15

Explanation:

`5a-10b=45` is the given equation

The value of b is 3, replace the variable b by 3

`5a-10b=45`

`5a-10(3)=45`

`5a-30=45`

To solve for 'a' , add 30 on both sides

`5a=75`

Divide both sides by 5 to get rid of 5

a= 15

the value of a= 15