First of all you need to get rid of the -27 on the left side, to do so you add 27 to both sides so it becomes:
5/8a=20
Now you can divide it by 5 to get:
1/8a=4
Now multiply it by 8 to get:
a=32
Hope this helps :)
Answer:

Step-by-step explanation:
Slope intercept form is
where <em>m </em>is the slope and <em>b </em>is the y-intercept.
Slope is
or
in this case = 
Substitute one of the coordinates for x and y. I am going to use (0, -4) so:

since m = 2 and b = -4, we can conclude that the equation would be

1. there are two methods to solve this system
I.substition
from the first relation we can deduct
2a-b=4
2a=4+b
a=(4+b)/2
now we substitute a in the second relation
(4+b)/2+b=5
we multiply by 2
4+b+2b=10
3b=6
b=6/3=2
a+2=5
a=3
II.reduction
2a-b=4
a+b=5
we can add the two relations together
2a+a-b+b=4+5
3a=9
a=3
3+b=5
b=2
If Makayla cuts her 3 yards of ribbon into pieces that are 1/4 yard long, she has 12 pieces. If Toni cuts his 4 yards of ribbon into pieces that are 1/4 yard long, he has 16 pieces.If you add them all together, you have 28 pieces of ribbon that is 1/4 of a yard long.