Answer:
b-4/5b
Step-by-step explanation:
b is decreased by 80%
dat is 80/100×b
= b-80/100b
8*7/4=7x
56/4=7x
14=7x
x=2
y=4/3x+7/3
Answer: 3x-x+2=4
Step-by-step explanation:i think i am correct
use a calculator
there for question b