Respuesta :

jyoung551780
You have to isolate the variable so you need to add 7z and 9 to both sides. You then get y+ 7z+ 9= 7x. Then divide 7x from both sides. The equation becomes x= y/7+ z + 9/7.
I hope this helps love! :)

Answer:

The value of x is [tex]x=\frac{y+7z+9}{7}[/tex]

Step-by-step explanation:

Consider the provided equation.  

[tex]y=7x-7z-9[/tex]

We need to solve the equation for x.

Add 7z to both the sides.

[tex]y+7z=7x-7z+7z-9[/tex]

[tex]y+7z=7x-9[/tex]

Add 9 to both the sides.

[tex]y+7z+9=7x-9+9[/tex]

[tex]y+7z+9=7x[/tex]

Divide both sides by 7.

[tex]x=\frac{y+7z+9}{7}[/tex]

Hence the value of x is [tex]x=\frac{y+7z+9}{7}[/tex].