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Find 2 numbers if Their sum is −7 and their difference is 14
1 answer:
The larger number is (-7+14)/2 = 3.5 .
The smaller number is (-7-14)/2 = -10.5 .
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The two equations a+b=-7, a-b=14 can be solved to get these results. It is genrally convenient to solve them by adding one to the other, or subtracting one from the other.
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