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Kryger [21]
3 years ago
14

Find two numbers, if Their sum is −7 and their difference is 14

Mathematics
2 answers:
saul85 [17]3 years ago
7 0

Answer:

3.5 and -10.5

Step-by-step explanation:

i checked, its correct

Mademuasel [1]3 years ago
6 0
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 is
the two numbers are 
a=3.5
and
b=-10.5
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