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Phổ biến Word Problems >

The sum of three numbers is 99. The third number is 4 times the second. The second number is 9 more than the first. What are the numbers?

Lời Giải

T h e s u m o f t h ree n u mb ers i s 99. T h e t hi r d n u mb er i s 4 t im es t h e seco n d . T h e seco n d n u mb er i s 9 m ore t han t h e f i rs t . Wha t a re t h e n u mb ers ?

Lời Giải

The numbers : 9, 18, 72

Các bước giải pháp

Represent the numbers with

x, y, z

:

number 1 : x

number 2 : y

number 3 : z

A.T.Q.:

x + y + z = 99

z = 4 y

y = 9 + x

x + y + z = 99, z = 4 y, y = 9 + x : x = 9, y = 18, z = 72

The numbers : 9, 18, 72

Ví dụ phổ biến

Three numbers are in the ratio 1:3:7. if the sum of the three numbers is 320. what are the numbers?Three sevenths of a number is 24. FInd the number If 3/4 of a number is 10 more than 1/3 the number, then what is the number?Five less than twice a number is 11. What is the number?Six times a number is equal to the number increased by 10 . Find the number.