Gasoline canisters

35 liters of gasoline is to be divided into 4 canisters so that in the third canister will have 5 liters less than in the first canister, the fourth canister 10 liters more than the third canister and the second canister half of that in the first canister. How many liters of gasoline are in each canisters?


a =  10
b =  5
c =  5
d =  15


c = a-5
d = 10 +c
b = a/2

a+b+c+d = 35
a-c = 5
c-d = -10
a-2b = 0

a = 10
b = 5
c = 5
d = 15

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