(1/3+1/2)*х=3.75 и еше одно уровнение( 3/5 - 0.25)*х=4.9
(1/3+1/2)*х=3.75 (2/6+3/6)*х=375/100 5/6х=15/4 х=15/4:5/6 х=15/4*6/5 х=3/2*3/1 х=9/2=4 целых 1/2 ( 3/5 - 0.25)*х=4.9 (0,6-0,25)*х=4.9 0,35х=4.9 х=4,9:0,35 х=14