Answer:
Answer 5 1/4
Step-by-step explanation:
The answer would be B because it's saying sum which means adding then it says less which means subtracting.
x = - 
- 4x - 25 = 8x + 15
subtract 8x from both sides
- 4x - 8x - 25 = 15
- 12x - 25 = 15
add 25 to both sides
- 12x = 15 + 25 = 40
divide both sides by - 12
x =
= - 
Answer:
b=A/h-a
Step-by-step explanation:
A=h(a+b)
a+b=A/h
b=A/h-a