math

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math

Postby tkbday » Wed Aug 20, 2008 8:23 am

I have 2 boys that are bothers. One is a toddler. The two together have a mass of 74 kilograms. One mass is 6 kilograms more than 3 times the other's mass. What are there weight.
tkbday
 

Re: math

Postby Guest » Thu Aug 21, 2008 6:03 am

Anonymous wrote:
tkbday wrote:I can't figure this out to save my life. I have 2 boys that are brothers. One is a toddler. The two together have a mass of 74 kilograms. One mass is 6 kilograms more than 3 times the other's mass. What are there weight.


*Assign unknowns
*Translate the words into equations
*Solve the equations.

Let the toddler weigh x. We don't know what x is yet, but we can work with it. The other weighs 3x + 6

The two together weigh x + 3x + 6 =74,
or 4x = 68.
Now you can solve for x, the toddler weight and go back to the equation for the other.
Guest
 


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