The sum of two numbers is 38. The larger of number is seven less than twice the smaller number.

解

T h e s u m o f tw o n u mb ers i s 38. T h e l a r g er o f n u mb er i s se v e n l ess t han tw i ce t h e s ma ll er n u mb er .

The numbers : 20 + 331, 18 - 331 or 20 - 331, 18 + 331

解答ステップ

Represent the numbers with

x and y

number 1 : x

number 2 : y

A.T.Q.:

x + y = 38

x y = 2 y - 7

x + y = 38, x y = 2 y - 7 : (x = 20 + 331, y = 18 - 331 x = 20 - 331, y = 18 + 331)

The numbers : 20 + 331, 18 - 331 or 20 - 331, 18 + 331