This can be solved using a system of equations.

Subtract y from both sides.

Substitute:

Subtract 80 from both sides:

Divide both sides by 5:

Substitute.
Answer:
B
Step-by-step explanation:
54/6=9 meaning each face has an area of 9.
Meaning each side has an area of 3.
That means the volume is 3*3*3=27
Answer:
x=5
Step-by-step explanation:
7x-10=25
+10 +10
7x=35
divide by 7 both sides
We can’t help u if their is no instructions on what u need to do sorry