Makenna K.

asked • 05/17/18

a total of 60 hand weights some of the weights are 3 pounds and the rest are 5 pounds if there are 10 more 5 pound weights then 3 pound weight how many of each

it is the gym instructor and i need help solving this problem. i don't know how to find the equations 

2 Answers By Expert Tutors

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Naomi S. answered • 05/17/18

Tutor
New to Wyzant

Patient and experienced math tutor

Alexander B.

Kudos to Naomi for this detailed and well-articulated solution using a substitution method. I have provided an alternative solution using elimination method to the same problem. And, in terms of computational efficiency, there is a third method using Determinant of a matrix representation, as it's implemented in my online Equation Solver http://examn8.com/SystemOfEquations.aspx (a useful tool to double-check the answer: it works on both decimals and fractions) Best regards, A.
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05/17/18

Alexander B. answered • 05/17/18

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Advanced Math and Science Tutoring and Test Prep online (SAT, ACT)

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