Mathematics, 20.09.2020 18:01, keke6361

14. 3 (a-2) -4 (29-3)= 15. 3 (x+2y) -2 (2x-y)
16. 3 (2c+d) -3 (3c-20)
17. 4 (a+3b+7) +2 (a-2b-1)

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14. 3 (a-2) -4 (29-3)= 15. 3 (x+2y) -2 (2x-y)
16. 3 (2c+d) -3 (3c-20)
17. 4 (a+3b+7) +2...