7x20 = 140 making that the total amount of decrease per week. Hope this helps!
Answer:
y=50
x=30
z=100
Step-by-step explanation:
x+20=y
2y=z
x+y+z=180
x+y+2y=180
3y+x=180
-y+x=-20
4y=200
y=50
x=30
z=100
Answer:
a
Step-by-step explanation:
Divide by 9=7/11. Hope this help you
Answer:

Step-by-step explanation:

We'll combine the
and the
on the right side.

Now, we'll subtract
from both sides.

Divide both sides by
.

Ta-da!