Find two numbers, if Their sum is −7 and their difference is 14
2 answers:
Answer:
3.5 and -10.5
Step-by-step explanation:
i checked, its correct
Let a------------> first number b------------> second number we know that a+b=-7--------> a=-7-b----------> equation 1 a-b=14--------> equation 2 <span>I substitute 1 in 2 </span> (-7-b)-b=14-------------> -7-b-b=14----------> -7-2b=14-------> 2b=-7-14 2b=-21---------> b=-10.5 a=-7-b-------> a=-7-(-10.5)-----> a=-7+10.5------> a=3.5 the answer isthe two numbers are a=3.5 and b=-10.5
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Answer:
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Step-by-step explanation:
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Answer:
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Step-by-step explanation:
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