Question

What does x equal in the equation
`(3)/(5)x- (1)/(4)x=7\\`

Answer 1

`x = 20`

Explanation:

`(3)/(5)x - (1)/(4)x = 7`

The LCD is 20, so multiply both sides of the equation by 20.

`20((3)/(5)x - (1)/(4)x) = 20 * 7`

`4 * 3x - 5 * x = 140`

`12x - 5x = 140`

`7x = 140`

`x = 20`