Let the number be x
The sum of 2 equal numbers is simply x+x or 2x.
3(9)=27
27+4Y=43
subtract 27 from both sides
4Y=16
devide both sides by 4
Y=4
Answer:
x = 10
Step-by-step explanation:
First, distribute:
Next, subtract 
from both sides:
(multiply by 2 to get common denominator, 
)
Next, subtract 
from both sides:
(multiply 
by 2 to get common denominator, 
)
⇒ 
Next, multiply both sides by 10:
FInally, divide both sides by -1:
x = 10
Answer:
8 rabbits
22 chickens
Step-by-step explanation:
c = chickens
r = rabbits
heads - c + r = 30
legs - 2c + 4r = 76
We can now use these two equations to create one by isolating the variable (c) in the first equation.
c = 30 - r
2c + 4r = 76
2(30 - r) + 4r = 76
60 - 2r + 4r = 76
2r = 16
r = 8
Now we know that there are 8 rabbits, which means that there has to be 22 chickens in order to have 30 heads.
