Question

Solve: `15/4 - 7x = 9`.

Answer 1

We have,

`15/4 - 7x = 9`

or - 7x = 9 - `15/4         ......("transposing" 15/4 "to RHS")`

or - 7x = `21/4`

or  `x = 21/(4 xx (-7))`    ......(Dividing both sides by - 7)  

or `x = - (3 xx 7)/(4 xx 7)`

or `x = - 3/4`

Check: LHS = `15/4 - 7((-3)/4) = 15/4 + 21/4 = 36/4` = 9 = RHS