Answer:
48
Step-by-step explanation:
Create an equation to represent this, where x is the unknown number.
+ 6 = 18
Solve for x, by first subtracting 6 from both sides:
= 12
Multiply each side by 4:
x = 48
So, the number is 48
The answer to your question
is 12
The area is perimeter times height plus area of the bases
Merry Christmas and a happy new year
X= -8/5y+16
y= -5/8x+10
you didnt say if the equation was "5x+8y=80" not sure if your adding or subtracting or adding but if your adding then this is correct :)