SOLUTION: One number is twice another. Their sum is 9.find the two numbers

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Question 520452: One number is twice another. Their sum is 9.find the two numbers
Answer by algebrahouse.com(1659) About Me  (Show Source):
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"One number is twice another. Their sum is 9.find the two numbers"

x = one number
2x = other number

x + 2x = 9 {their sum is 9}
3x = 9 {combined like terms}
x = 3 {divided both sides by 3}
2x = 6 {substituted 3, in for x, into 2x}

3 and 6 are the two numbers

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