2. -3x7y-y+2y = -21y-y +2y = -20y
3. 28y) + x +5y = 33y × +5y= 33y + ×
4. 4a - 2b - 3b = 4a - 5b
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2. -3x7y-y+2y = -21y-y +2y = -20y
3. 28y) + x +5y = 33y × +5y= 33y + ×
4. 4a - 2b - 3b = 4a - 5b