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 différence between 7 times the first number and the second number is 50. Find the three numbers.

Solution

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.

Solution

The numbers : 8, 6, 4

étapes des solutions

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

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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 différence between 7 times the first number and the second number is 50. Find the three numbers.

Solution

Solution

Exemples populaires

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 différence between 7 times the first number and the second number is 50. Find the three numbers.