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Popolare Word Problems >

The sum of three numbers is 120 . The first number is 5 less than the third. The second number is 3 times the third. What are the numbers?

Soluzione

T h e s u m o f t h ree n u mb ers i s 120 . T h e f i rs t n u mb er i s 5 l ess t han t h e t hi r d . T h e seco n d n u mb er i s 3 t im es t h e t hi r d . Wha t a re t h e n u mb ers ?

Soluzione

The numbers : 20, 75, 25

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 = 120

x = z - 5

y = 3 z

x + y + z = 120, x = z - 5, y = 3 z : x = 20, y = 75, z = 25

The numbers : 20, 75, 25

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