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aambitiouss
08.01.2020 •
Mathematics
Iam three years younger than my brother and i am 2 years older than my sister my moms age is one less than three times my brothers age when you add all our ages you get 87 what are our ages?
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Ответ:
-a will be greater than -b because for example, when a=2 and b=5, -a=-2 and -b=-5