lexy148 lexy148

08-04-2017
Mathematics

contestada

The sum of two numbers is 90. Their difference is 18. Find the numbers.

Respuesta :

09-04-2017

a+b=90, let b>a, so b-a=18

from the first statement b=90-a, using this value of b in the second gives you:

(90-a)-a=18

90-2a=18

-2a=-72

a=36, and since b=90-a

b=90-36=54. so the numbers are

54 and 36

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