Question

andy has twice marbles as many as pandy have and sand has half as many as andy and pandy put together. if andy has75 marbles more than sandy how many marbles each has

Answer 1

hi Flower,

Let number of marbles with Andy,Sandy and Pandy be a,s,p respectively
Given

Andy has twice marbles as many as pandy
a = 2p

sandy has half as many as andy and pandy put together
s = 1/2(a+p)

andy has75 marbles more than sandy
a = 75+s

solving
put a=2p in s = 1/2(a+p)
s = 1/2(3p)
s = 3p/2

put s value in a = 75+s
a= 75+3p/2
now also a = 2p

so equating for 'a' values
2p = 75+3p/2
p (2 - 3/2 ) = 75
p/2 = 75
p = 150
a = 2p = 300
s = 3p/2 = 450 / 2 = 225 


p = 150
a = 300
s = 225

Hope it helped
Let me know if any doubts.
Cheers !!!

Answer 2

Ok attached is the solution