The sum of three numbers is 18. The sum of twice the first number, 4 times the second number, and 5 times the third number is 60. The разность between 7 times the first number and the second number is 50. Find the three numbers.

Решение

The sum of three numbers is 18. The sum of twice the first number, 4 times the second number, and 5 times the third number is 60. The difference between 7 times the first number and the second number is 50. Find the three numbers.

Решение

The numbers : 8, 6, 4

Шаги решения

Represent the numbers with

x, y, z

number 1 : x

number 2 : y

number 3 : z

A.T.Q.:

x + y + z = 18

2 x + 4 y + 5 z = 60

7 x - y = 50

x + y + z = 18, 2 x + 4 y + 5 z = 60, 7 x - y = 50 : x = 8, y = 6, z = 4

The numbers : 8, 6, 4

The sum of three numbers is 18. The sum of twice the first​ number, 4 times the second​ number, and 5 times the third number is 60. The разность between 7 times the first number and the second number is 50. Find the three numbers.

Решение

Решение

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The sum of three numbers is 18. The sum of twice the first number, 4 times the second number, and 5 times the third number is 60. The разность between 7 times the first number and the second number is 50. Find the three numbers.