rafael2428 rafael2428

02-11-2021
Chemistry

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The sum of three numbers is 68. The first number is 7 less than the second. The third number is 3 times the second. What are the numbers ?

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rosetiwaa277 rosetiwaa277

02-11-2021

Answer:

8,15 and 45 respectively

Explanation:

let x be the second number

x-7 = the first number

3x= the third number

x-7+x+3x=68

5x-7=68+7

5x=68+7

5x=75

divide both side by 5

x=15

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