slain slain 11-09-2020 Mathematics contestada 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)