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5x - 3x + 7y - 3y
2x + 4 y
2. (11x + 24) - (15x - 18)
11x - 15x + 24 + 18
-4x + 42
3. (28y2 + 24y) - ( 12x2 + 20 y )
12x2 + 28y2 + 24y - 20 y
12x2 + 28y2 + 4y
4. (9x-6) - ( 5x - 3)
9x - 5x -6 +3
4x - 3
5. ( 9x - 10y + 12 ) - ( 12x + 8y - 9)
9x - 12x - 10y - 8y + 12 + 9
- 3 x -18 y + 21
semoga dapat membantu ya ~