Let
m ----> the first number
n ----> the second number
we have that
m+n=-16 -------> m=-16-n -----> equation 1
m=7n -------> equation 2
Solve the system of equations
equate equation 1 and equation 2
-16-n=7n
solve for n
7n+n=-16
8n=-16
n=-16/8
n=-2
Find out the value of m
m=7n ------> m=7(-2)
m=-14
therefore
