Two numbers

Determine the numbers x and y so x + y = 8 is truth and the numbers are in the ratio of 4: 5.

Correct result:

x =  3.5556
y =  4.4444


5x = 4y

5•x = 4•y

x+y = 8
5x-4y = 0

x = 32/9 ≈ 3.555556
y = 40/9 ≈ 4.444444

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