SOLUTION: Krista weighs eight times as much as her baby sister. When their weights are combined, they weigh 54 kg. How much does Krista weighs?

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Question 760518: Krista weighs eight times as much as her baby sister. When their weights are combined, they weigh 54 kg. How much does Krista weighs?
Answer by ramkikk66(644) About Me  (Show Source):
You can put this solution on YOUR website!
Let the baby sister's weight be x kg
Then, Krista's weight = 8%2Ax as given in the problem.
Combined weight = +x+%2B+8%2Ax+=+54
or
9%2Ax+=+54
Dividing both sides by 9,
x+=+54%2F9+=+6
So, baby sister weighs 6 kg
Krista's weight = 8%2A6+=+48 kg
Got it?