Answer:
3 machine
Step-by-step explanation:
It is given that 6 machine each working at the same rate can complete the work in 12 days
We the has to complete in 8 days
Let we need x extra machine to complete the work in 8 days
So total number of machines =x+6
Now according to man work day equation 



x=3 machine
Answer: 4x
Step-by-step explanation: Move all terms that don't contain y to the right side and solve. y = 4x
F(180) = x/30
= 180/30 = 6 gallons of gas is needed
Answer(-2:23)
Step-by-step explanation:gose in a pattern.