1. (5a - 7b) - (11-2b)
2. (3x + 2y) - (9x + 4y)
3. 2 (4a+ 3b)
tolongin kak
2. (3x + 2y) - (9x + 4y)
3. 2 (4a+ 3b)
tolongin kak
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