Respuesta :

ivycoveredwalls
Start by multiplying both sides of the equation by 7 (the common denominator).

[tex]7 \left(\frac{6z}{7} -27 \right)=7\left(\frac{21-4z}{7} \right) \\ 6z-189=21-4z[/tex]

Add 4z to both sides.

[tex]10z-189=21[/tex]

Add 189.

[tex]10z=210 \\ z=21[/tex]