Kim made soup which contains 75 total ounces of beans. The soup has 2 kinds of beans, black and red. There are 4 times as many ounces of black beans as red beans. How many ounces of red beans are in the soup?
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Kim made soup which contains 75 total ounces of beans. The soup has 2 kinds of beans, black and red. There are 4 times as many ounces of black beans as red beans. How many ounces of red beans are in the soup?
RB + BB = 75
BB = 4 • RB
RB + BB = 75
RB + 4RB = 75
5RB = 75
RB = 15
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