8(0,2b–7)–3(0,5b–9)+9b=1,6b-56-1,5b+27+9b=9,1b-29
8 (0,2 b – 7) – 3 (0,5 b – 9) + 9 b = 1,6b - 56 - 1,5b + 27 + 9b = 9,1b - 29
8(0,2b–7)–3(0,5b–9)+9b=1,6b-56-1,5b+27+9b=9,1b-29
8 (0,2 b – 7) – 3 (0,5 b – 9) + 9 b = 1,6b - 56 - 1,5b + 27 + 9b = 9,1b - 29