13-01-2016
Mathematics

contestada

The sum of two numbers is 25 one number is twice the second number +7 what are the two numbers

Respuesta :

13-01-2016

x = first number
y = second number

x + y = 25
x = 2y +7
2y + 7 + y = 25
3y + 7 = 25
3y + 7 - 7 = 25 - 7
3y = 18
3y / 3 = 18 / 3
y = 6

25 - 6 = 19

The two numbers are 6 and 19

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