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

$\frac{1}{7}(y+7z+9)=\frac{7x}{x}$

$\frac{1}{7}(y+7z+9)=x$

Thus, the value of x is given by

$x=\frac{1}{7}(y+7z+9)$