Question

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

Answer 1

the answer to word problem is b = -4

Answer 2

15

Explanation:

Given: 5 a minus 10 b equals 45

To find: Value of a when b equals 3

Solution: It is given that 5 a minus 10 b equals 45. To find the value of a when b equals 3, first we need to write an equation for the given statement.

We have 5 a minus 10 b equals 45, so the equation becomes

`5a-10b=45`

Now, we need to find the value of a when b equals 3. So, we need to put 3 in place of b in the equation
`5a-10b=45`

So, we have

`5a-10(3)=45`

`\implies5a-30=45`

`\implies5a=45+30`

`\implies5a=75`

`\implies a=(75)/(5)`

`\implies a=15`

Hence, the value of a when b equals 3 is 15.