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Ksju [112]
4 years ago
8

Alan is 5 years older than Bob. Bob is twice as old as Cindy. All their ages add up to 20. What are their ages?

Mathematics
1 answer:
Llana [10]4 years ago
6 0
We can use a variable equation to solve this. Let A represent alan's age, B represent bob's age, and C represent Cindy's age. So Bob's age would be Alan's age - 5, or a -5 = B. Then Bob's age would be double Cindy's age, so that means 2 multiplied by Cindy's age = Bob's age, or 2C = B. Your two equations are: 

A - 5 = B
2C = B

Also a third equation that helps is A + B + C = 20.

Finally, here are the ages. 
Alan = 11 years old
Bob = 6 years old
Cindy = 3 years old.

PS: Sorry, I'm not that good at explaining things, but here are the answers
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a student required to 40% marks to pass in exam he got 190 marks and fail with 10 marks. find total marks?
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3 0
2 years ago
Part B: Solve 2a − 5d = 30 for d. Show your work. (6 points)
stich3 [128]
<span>Given Equation: 2a − 5d = 30 

Solution:

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3 0
4 years ago
What is the value of x in the equation is 4+6x=-3+7x​
Anvisha [2.4K]

Answer:

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Step-by-step explanation:

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  3. so take 6x away from the 7x on the right side and that leaves 1x so it should look like this 4=-3+1x
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and thats all there is to it hope this helps

5 0
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