Respuesta :

Answer:

[tex]=-0.5z+0.3[/tex]

Step-by-step explanation:

Given

[tex](-0.5z+0.9z)-(-0.3+0.9z)=[/tex]

Required

Simplify

Start by removing brackets

[tex]= -0.5z+0.9z+0.3-0.9z[/tex]

Collect Like Terms

[tex]=-0.5z+0.9z-0.9z+0.3[/tex]

[tex]=-0.5z+0.3[/tex]