alexusalmaguer1 alexusalmaguer1

12-11-2018
Mathematics

contestada

the sum of three numbers is 130. the second number is twice the first. the third number is equal to twice the second minus 1/2 of the first.

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hanahleekim hanahleekim

12-11-2018

The first number is 20

The second is 40

The third is 70

the first number = a

The second number = 2a

The third number = 3 1/2a

6 1/2a = 130

a = 20

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