6.4+2.1(z-2)=8.5

Question

Can you show the work

Answer 1

6.4+2.1(z-2)=8.5
6.4+(2.1•z)-(2.1•-2)=8.5
6.4+2.1z-4.2=8.5
2.1z+6.3=8.5
2.1z=-2.1
Z=3