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Popolare Word Problems >

the sum of three numbers is 69. the third is 2 times the second. the first number is 9 more than the second. what are the numbers

Soluzione

t h e s u m o f t h ree n u mb ers i s 69. t h e t hi r d i s 2 t im es t h e seco n d . t h e f i rs t n u mb er i s 9 m ore t han t h e seco n d . w ha t a re t h e n u mb ers

Soluzione

The numbers : 24, 15, 30

Fasi della soluzione

Represent the numbers with

x, y, z

:

number 1 : x

number 2 : y

number 3 : z

A.T.Q.:

x + y + z = 69

z = 2 y

x = 9 + y

x + y + z = 69, z = 2 y, x = 9 + y : x = 24, y = 15, z = 30

The numbers : 24, 15, 30

Esempi popolari

Twice the differenza of a number and 7 is at most 16 Two more than the product of a number and 8 is equal to 6 69% of a number is 69 A square has an area of 25cm^2 What is the length of each side?Is the following number rational or irrational?: 9