Question

Solve for x. y=7x−7z−9

Answer 1

y = 7x - 7z - 9...for x
y + 7z + 9 = 7x
(y + 7z + 9)/7 = x
1/7y + z + 9/7) = x

Answer 2

We have been given the equation
`y=7x-7z-9`

We have to solve it for x.

First of all, we add 7z and 9 to both sides of the equation

`y=7x-7z-9=7x-7z-9+7z+9`

The terms 7z and 9 will get cancelled from the right hand side and we are left with

`y+7z+9=7x`

Now in order to get rid of 7 from the right hand side, we can divide both sides by. On dividing both sides by 7, we get

`(1)/(7)(y+7z+9)=(7x)/(x)`

`(1)/(7)(y+7z+9)=x`

Thus, the value of x is given by

`x=(1)/(7)(y+7z+9)`