mariahc2002oxz77c mariahc2002oxz77c

19-10-2017
Mathematics

contestada

the sum of two numbers is 55 and the difference is 9. what are the numbers?

Respuesta :

nichellec925 nichellec925

19-10-2017

x + y= 55
x - y= 9
y = 23
x = 32

the numbers are 23 and 32

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TriStateRailfan TriStateRailfan

19-10-2017

Difference is 9: x-y=9
From the second equation x=9+y (substitute that into the first equation to solve for y).
9+y+y=55

2y=46

y=23. (Substitute that back into the second equation to find x.)
x=9+y = 23+9 = 32.
23+32 = 55 (Check).

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