For this case we must find an expression equivalent to:
We add similar terms:
Different signs are subtracted and the sign of the major is placed:
Thus, an equivalent expression is:
Answer:
3 are green and 6 are yellow. The 3 green cards are numbered 1, 2, and 3. The 6 yellow cards are numbered 1, 2, 3, 4, 5, and 6.
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