a) 9x + 28 = 2755;
510+14x = 762;
b) 5y-97 = 943;
410 -7 y = 151;
c) 3(x + 7) = 75; e) 111+ 2x + 29 = 10°:
14(12 - x)= 70;
5x+52-31 = 30° -19.​