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Algebra Difficulty 1.9 Junior Find the answer
What is the value of (3x+2y)−(3x−2y) when x=−2 and y=−1?
A number or a short expression. Spacing and $ signs are ignored.
Solution
The expression (3x+2y)−(3x−2y) is equal to 3x+2y−3x+2y which equals 4y. When x=−2 and y=−1, this equals 4(−1) or −4.
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