Gates 200 every week for lunch money she sets aside 20 every school day . how many weeks did it take for her to Save up 650
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As you get 200 every week and you spend 20 on school days
which means you spend 20*5=100 in a week.
So , saving in 1 week=200-100=100
So saving of 650 will be in 650/100=6.5 weeks
which means you spend 20*5=100 in a week.
So , saving in 1 week=200-100=100
So saving of 650 will be in 650/100=6.5 weeks
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