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PJohnson89
 3 years ago
A farmer looks into the barnyard at his pigs and chickens and he counts 169 heads and 398 feet how many pigs and chickens are their?
I need an equation PLEASE
PJohnson89
 3 years ago
A farmer looks into the barnyard at his pigs and chickens and he counts 169 heads and 398 feet how many pigs and chickens are their? I need an equation PLEASE

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ash2326
 3 years ago
Best ResponseYou've already chosen the best response.0@PJohnson89 how many legs a chicken has? and a pig?

ashna
 3 years ago
Best ResponseYou've already chosen the best response.1X = Pigs Y = Chickens Total heads (assume 1 per pig and 1 per chicken) = 169 Total legs (assume 4 per pig and 2 per chicken) = 398 X + Y = 169 heads 4X + 2Y = 398 legs You now have two equations with two unknowns, ready to solve. Y = 169  X Substitute for Y 4X + 2(169  X) = 398 4X + 338  2X = 398 2X = 60 X = 30 Pigs now if you still didn't understand .. raise questions ;)

ashna
 3 years ago
Best ResponseYou've already chosen the best response.1@PJohnson89 should i be more clear ?

ashna
 3 years ago
Best ResponseYou've already chosen the best response.1okay .. let x = pigs and y = chickens got it ?

ashna
 3 years ago
Best ResponseYou've already chosen the best response.1in maths we use variables such as x and y , so that doin eqns will be easy or say we can even take for chickens = C and pigs = P if that is what you prefer :)

ashna
 3 years ago
Best ResponseYou've already chosen the best response.1okay .. now chickens = C and pigs = P

ashna
 3 years ago
Best ResponseYou've already chosen the best response.1given that p + c = 169 (head) and 4p+2c = 398 (legs) because head is one for both pig and chicken and leg for a chicken is two and for a pig 4 .. got it ?

ashna
 3 years ago
Best ResponseYou've already chosen the best response.1okay .. good now , Multiply 1st equation by 2 2 P + 2 C = 338 4 P + 2 C = 398 ( CHANGING SIGNS IN THE 2ND EQN) 2P  0 = 60 2P = 60 P = 30 SO MUCH UNDERSTOOD ?

ashna
 3 years ago
Best ResponseYou've already chosen the best response.1@PJohnson89 dealing with a problem ?

PJohnson89
 3 years ago
Best ResponseYou've already chosen the best response.0why does the sign change in the second half

ashna
 3 years ago
Best ResponseYou've already chosen the best response.1it is like that .. that is a part of math .. like let me ask you what is 2 * 3 ?

ashna
 3 years ago
Best ResponseYou've already chosen the best response.1yes .. just like that in quadratic eqns sign changes in the second eqn which is universally acceptd .. got it ?

ashna
 3 years ago
Best ResponseYou've already chosen the best response.1can you proceed now ? we have found that pig = 30 now you try doing for chickens ;)

ashna
 3 years ago
Best ResponseYou've already chosen the best response.1do for chicken .. or you want me to do that too ?

PJohnson89
 3 years ago
Best ResponseYou've already chosen the best response.0I will try it tomorrow I have to go to work in the morning
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