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al, bill and carl went shopping. when they compared the totals that each had spent they found that al and bill together spent a total of 1200, bill and carl together spent a total of 1800, and al and carl together spent a total of 1000. how much did each person spend?

Sagot :

al=a ,b=bill,c=carl
spent together:
ab=1200 bc=1800 ac=1000
therefore ,
al spent : 200 bill spent: 1000 Carl spent:800
al+bill=1200
bill+Carl =1800 and
al +Carl= 1000