1) 12,6 - 6,85х = 56,4 + 0,45х задание решить уравнение заранее благодарю 2) 2(4 - 9d) -...

$1) \ 12.6 - 6.85x = 56.4 + 0.45x\\\\ - 6.85x - 0.45x = 56.4 - 12.6\\\\ - 7.3x = 43.8\\\\ x = - \frac{438}{73}\\\\ \fbox{x = -6}\\\\ 2) \ 2(4 - 9d) - (2d + 3) = -8(4 - d) + 3(1+ 2d)\\\\ 8 - 18d - 2d - 3 = -32 + 8d + 3 + 6d\\\\ 5 - 20d = -29 + 14d\\\\ - 20d - 14d = -29 -5\\\\ -34d = - 34\\\\ \fbox{d = 1}\\\\ 3) \ 5(2 - 3b) - 4(6 + 2b) = 28 - (b - 2)\\\\ 10 - 15b - 24 - 8b = 28 - b + 2\\\\ -14 - 23b = 30 - b\\\\ -23b + b = 30 + 14\\\\ -22b = 44\\\\ \fbox{b = -2}$