Mathematics, 24.09.2019 02:30 waterborn7152

Bob has some 10lb weights and some 3lb weights. together, all his weights add up to 50 lb. if x represents the number of 3lb weights and y represents the number of 10lb weights, which equation can be used to find the number of each type of weight bob has?
( explain answer)
a. 3x-10y=50
b.3x=50-10y
c.50+10y=3y
d.50+3y=10y

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