Find two numbers if the sum is -7 and the difference if 14

Question

is a math bproblem i don't know how to do

Answer 1

n + m = -7

n - m = 14

 

Add the 2 equations and get

 

2n = 7

n = 7/2 = 3.5

m = -7 - n = -7 - 3.5 = -10.5

 

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