Answer:
16 and -15
Step-by-step explanation:
Let the numbers be x and y
x+y = 1 ..............(1)
5x + 4y = 20 .........(2)
Solve simultaneously using elimination method by multiplying equation 1 by 5 to eliminate x
5x + 5y = 5
5x + 4y = 20. Subtract the eqns from each other
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5y - 4y = 5-20
y = -15
Put value of y into equation 1
x+y = 1
x -15 = 1
Add 15 to both sides
x = 1+15
x = 16
Therefore the numbers are 16 and -15
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