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16 POINTS!!!!

Four times a certain number is 92. What is the number?

Seven times a certain number is 266. What is the number?

The sum of a certain number and 15 is 41. What is the number?

Separate the number 24 into two parts so that one number is twice the other number.

If 5 times a number is decreased by 12, the result is 108. What is the number?

Three less than three times a number is 45. What is the number?

Mia is 4 years younger than her brother Bob. If the sum of their ages is 18, How old are Mia and Bob?

Respuesta :

Mannyj99
1.Let the Second number = X
Now, the first number = 2X (since first number is twice the second number)
The third number = (X+2X)+ 4 = 3X +4 (third number is 4 times more than the sum of the first two)
The fourth number = 2X-X -3 = x-3(since it is 3 less than the difference of the first two numbers) 
And finally we have the sum of all the numbers = 92 
i.e. X+2X+3X +4 +X-3 =92
7x = 92-1
7x = 91 
OR X = 13 

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