Question

How to slove equations with brackets make x the subject 9(x+a)=b?

Answer 1

`x= b/9 -a`

Explanation:

Multiply the two terms inside the bracket by 9

`9x + 9a= b`

Transpose 9a to right side, with change of sign

`9x=b-9a`

Divide both sides by 9( the multiple before x)

`x=(b-9a)/9` which is same as `b/9 -a`

Simpler way:

Divide both sides of original by 9
`9(x + a)= b` becomes

`(x + a)= b/9`, get rid of the bracket

`x + a= b/9`,

Transpose a to right side, with change of sign

So `b/9 -a`