2 1/8+15/16 х+1 3/4х+1/2=5 5/16
2 1/8+15/16х+1 3/4х+1/2=5 5/16 15/16х+1 3/4х=5 5/16-2 1/8-1/2 15/16х+7/4х=85/16-17/8-1/2 15/16х+28/16х=85/17-34/16-8/16 43/16х=43/16 х=43/16 : 43/16 х=1