3 6/11 x+1 4/33 x =12,6

3 6/11х + 1 4/33х = 12,6;

х * (3 6/11 + 1 4/33) = 12,6;

х * (3 + 1 + 6/11 + 4/33) = 12,6;

х * (4 + (6 * 3)/(11 * 3) + 4/33) = 12,6;

х * (4 + 18/33 + 4/33) = 12,6;

х * (4 + (18 + 4)/33) = 12,6;

х * (4 + 22/33) = 12,6;

х * (4 + (2 * 11)/(3 * 11)) = 12,6;

х * (4 + 2/3) = 12,6;

х * 4 2/3 = 12,6;

х = 12,6 : 4 2/3;

х = 12 6/10 : 4 2/3;

х = (12 * 10 + 6)/10 : (4 * 3 + 2)/3;

х = (120 + 6)/10 : (12 + 2)/3;

х = 126/10 : 14/3;

х = 126/10 * 3/14;

х = (126 * 3)/(10 * 14);

х = (14 * 9 * 3)/(10 * 14);

х = (9 * 3)/10;

х = 27/10;

х = 2,7.