Answer:
7/2z +4
Step-by-step explanation:
z(4-1/2)+4
=7/2z +4
7.5
Remove parentheses; z=4-1/2+4
Add the 4s: -1/2+8
convert to fraction: 8*2/2-1/2
combine fractions:8*2-1/2
8*2-1=15
15/2
now convert 15/2 to a decimal, boom, 7.5
