neilfatih neilfatih
  • 15-03-2021
  • Mathematics
contestada

EASY POINTS!!
Find two numbers if....
Their sum is -7 and their difference is 14

Respuesta :

ashtonluca
ashtonluca ashtonluca
  • 15-03-2021

Let

a------------> first number

b------------> second number

we know that

a+b=-7--------> a=-7-b----------> equation 1

a-b=14--------> equation 2

I substitute 1  in 2

(-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

now gimme brainliest

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