azarco7879
azarco7879
11-12-2017
Mathematics
contestada
How many tickets were sold on Sunday? Thanks
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xisca
xisca
11-12-2017
the answer is 210 children tickets were sold . if you multiply the first equation by 7 it would be 7x+7y=2590. then subtract equation 2 from 1 you will have 4x=840 so x=210. Also you can use substitution method.
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