8m+m-7=256 x+ 2 1/4=2 3/4. 1,7x+3,804=8,02. 2,06-x-6,76=8,69

8m+m-7=256 9m-7=2569m=256+79m=263m=263:9m=29 2/9-----------------------x+ 2 1/4=2 3/4. x=2 3/4-2 1/4x=2/4x=1/2---------------1,7x+3,804=8,02. 1,7x=8,02-3,8041,7x=4,216x=4,216:1,7x=2,48---------------2,06-x-6,76=8,69-4,7-x=8,69-x=8,69+4,7-x=13,39x=-13,39