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Phổ biến Word Problems >

the sum of three consecutive numbers is 39. First write an equation and then find the value of the smallest number

Lời Giải

t h e s u m o f t h ree co n sec u t i v e n u mb ers i s 39. F i rs t w r i t e an e q u a t i o n an d t h e n f in d t h e v a l u e o f t h e s ma ll es t n u mb er

Lời Giải

The smallest number : 12

Các bước giải pháp

Represent the numbers with

x

:

First number : x

Consecutive number 1 : x + 1

Consecutive number 2 : x + 2

A.T.Q.:

x + x + 1 + x + 2 = 39

Giải

x + x + 1 + x + 2 = 39 : x = 12

x + 1 = 12 + 1 = 13

x + 2 = 12 + 2 = 14

Select the smallest solution:

12

The smallest number : 12

Ví dụ phổ biến

Seven less than a number, x, is the same as 15 the sum of a number x and 10 the sum of a number x and 1-in how much time will a sum of 1600 amount to 1852.20 at 5% per annum compound interest three times a number, minus 6, is equal to two times the number, plus 8