Question

Bob has some 10 lb weights and some 3 lb weights. Together, all his weights add up to 50 lbs. If x reprecents the number of 3 lb weights and y reprecents the number of 10 lb weights, which equation can be used to find the number of each type of weight bob has?

Answer 1

X= number of 3 lb weights
Y= number of 10 lb weights

3x + 10y = 50
-3x -3x
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10y = -3x + 50
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10 10 10

y = -3x/10 + 5