Question

How do you solve for `x` : `3( b x - 2a b ) = b ( x - 7a ) + 3a b`?

Answer 1

`x = a`

Explanation:

you will be expanding and then simplifying in this one.

`3(bx - 2ab) = b(x - 7a) + 3ab`

expand
`3bx - 6ab = bx - 7ab + 3ab`

collect like terms
`3bx - 6ab = bx - 4ab`
`3bx - 2ab = bx`
`2bx - 2ab = 0`

isolate `x`
`2bx = 2ab`
`x = (2ab)/(2b)`

voila
`x = a`