If you count 52 purple rough corn kernels and 50 yellow smooth corn kernels how many people smooth corn kernels should you expect to count? How many yellow rough corn kernels should you expect to count?

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

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"d.) carbon dioxide and hydrogen sulfide"

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